Merged all of the open clientv2 reviews into one unified change.

- Add clientv2 implementation of "job status" with jobkey wildcard support.
- Add clientv2 implementations of "job update" and "job list"
- Add clientv2 implementation of "job restart"
- Add clientv2 implementation of "job cancel_update"
- Extract more common options into "options.py".
- General code cleanup.

This supersedes the following reviews:
- https://reviews.apache.org/r/17153/
- https://reviews.apache.org/r/17051/
- https://reviews.apache.org/r/17154/
- https://reviews.apache.org/r/16306/

Testing Done:
============================= test session starts ==============================
platform darwin -- Python 2.7.2 -- pytest-2.5.1
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src/test/python/apache/aurora/admin/test_mesos_maintenance.py ...

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src/test/python/apache/aurora/client/test_binding_helper.py ..

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src/test/python/apache/aurora/client/test_config.py ......

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src/test/python/apache/aurora/client/api/test_disambiguator.py ......

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src/test/python/apache/aurora/client/api/test_job_monitor.py .

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src/test/python/apache/aurora/client/api/test_restarter.py ......

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platform darwin -- Python 2.7.2 -- pytest-2.5.1
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src/test/python/apache/aurora/client/api/test_scheduler_client.py ...............................................

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src/test/python/apache/aurora/client/api/test_instance_watcher.py ........
src/test/python/apache/aurora/client/api/test_health_check.py ............

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platform darwin -- Python 2.7.2 -- pytest-2.5.1
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src/test/python/apache/aurora/client/api/test_updater.py ..........................

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src/test/python/apache/aurora/client/api/test_quota_check.py ......

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============================= test session starts ==============================
platform darwin -- Python 2.7.2 -- pytest-2.5.1
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src/test/python/apache/aurora/client/cli/test_cancel_update.py ..
src/test/python/apache/aurora/client/cli/test_create.py ....
src/test/python/apache/aurora/client/cli/test_diff.py ...
src/test/python/apache/aurora/client/cli/test_kill.py .....
src/test/python/apache/aurora/client/cli/test_restart.py ...
src/test/python/apache/aurora/client/cli/test_status.py .....
src/test/python/apache/aurora/client/cli/test_update.py ...

========================== 25 passed in 1.42 seconds ===========================
============================= test session starts ==============================
platform darwin -- Python 2.7.2 -- pytest-2.5.1
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src/test/python/apache/aurora/client/commands/test_cancel_update.py ..
src/test/python/apache/aurora/client/commands/test_create.py ......
src/test/python/apache/aurora/client/commands/test_diff.py ...
src/test/python/apache/aurora/client/commands/test_kill.py ...
src/test/python/apache/aurora/client/commands/test_listjobs.py ..
src/test/python/apache/aurora/client/commands/test_restart.py ...
src/test/python/apache/aurora/client/commands/test_status.py ..
src/test/python/apache/aurora/client/commands/test_update.py ...

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src/test/python/apache/aurora/client/commands/test_run.py .

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src/test/python/apache/aurora/client/commands/test_ssh.py .

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src/test/python/apache/aurora/client/hooks/test_hooked_api.py ............

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src/test/python/apache/aurora/client/hooks/test_non_hooked_api.py ....

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src/test/python/apache/aurora/executor/test_thermos_task_runner.py .....

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src/test/python/apache/aurora/executor/common/test_directory_sandbox.py ..

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src/test/python/apache/aurora/executor/common/test_health_checker.py ...

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============================= test session starts ==============================
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src/test/python/apache/aurora/executor/common/test_status_checker.py .

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============================= test session starts ==============================
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src/test/python/apache/aurora/executor/common/test_task_info.py .

=========================== 1 passed in 0.14 seconds ===========================
Build operating on targets: OrderedSet([PythonTestSuite(src/test/python/apache/aurora/BUILD:all)])
src.test.python.apache.aurora.admin.mesos_maintenance                           .....   SUCCESS
src.test.python.apache.aurora.client.api.disambiguator                          .....   SUCCESS
src.test.python.apache.aurora.client.api.instance_watcher                       .....   SUCCESS
src.test.python.apache.aurora.client.api.job_monitor                            .....   SUCCESS
src.test.python.apache.aurora.client.api.quota_check                            .....   SUCCESS
src.test.python.apache.aurora.client.api.restarter                              .....   SUCCESS
src.test.python.apache.aurora.client.api.scheduler_client                       .....   SUCCESS
src.test.python.apache.aurora.client.api.updater                                .....   SUCCESS
src.test.python.apache.aurora.client.binding_helper                             .....   SUCCESS
src.test.python.apache.aurora.client.cli.job                                    .....   SUCCESS
src.test.python.apache.aurora.client.commands.core                              .....   SUCCESS
src.test.python.apache.aurora.client.commands.run                               .....   SUCCESS
src.test.python.apache.aurora.client.commands.ssh                               .....   SUCCESS
src.test.python.apache.aurora.client.config                                     .....   SUCCESS
src.test.python.apache.aurora.client.hooks.hooked_api                           .....   SUCCESS
src.test.python.apache.aurora.client.hooks.non_hooked_api                       .....   SUCCESS
src.test.python.apache.aurora.common.test_aurora_job_key                        .....   SUCCESS
src.test.python.apache.aurora.common.test_cluster                               .....   SUCCESS
src.test.python.apache.aurora.common.test_cluster_option                        .....   SUCCESS
src.test.python.apache.aurora.common.test_clusters                              .....   SUCCESS
src.test.python.apache.aurora.common.test_http_signaler                         .....   SUCCESS
src.test.python.apache.aurora.config.test_base                                  .....   SUCCESS
src.test.python.apache.aurora.config.test_constraint_parsing                    .....   SUCCESS
src.test.python.apache.aurora.config.test_loader                                .....   SUCCESS
src.test.python.apache.aurora.config.test_thrift                                .....   SUCCESS
src.test.python.apache.aurora.executor.common.directory_sandbox                 .....   SUCCESS
src.test.python.apache.aurora.executor.common.health_checker                    .....   SUCCESS
src.test.python.apache.aurora.executor.common.status_checker                    .....   SUCCESS
src.test.python.apache.aurora.executor.common.task_info                         .....   SUCCESS
src.test.python.apache.aurora.executor.executor_detector                        .....   SUCCESS
src.test.python.apache.aurora.executor.executor_vars                            .....   SUCCESS
src.test.python.apache.aurora.executor.thermos_task_runner                      .....   SUCCESS

Bugs closed: aurora-53, aurora-54

Reviewed at https://reviews.apache.org/r/17185/