Revert "Instruct jacoco gradle plugin to save coverage details needed by jacoco jenkins plugin."

This wound up breaking coverage reports in a way such that they were generated, but did not accurately report coverage.

Going to TBR commit to make progress.

Reviewed at https://reviews.apache.org/r/23782/
Remove IsolatedSchedulerModule and surrounding code.

Bugs closed: AURORA-340

Reviewed at https://reviews.apache.org/r/20648/
Add a lightweight version of command hooks for clientv1 commands.

Bugs closed: aurora-581

Reviewed at https://reviews.apache.org/r/23455/
Stage outline of announcer test.
AURORA-595: Do not rely upon pytest capsys since command line parameters alter outcome.

Testing Done:
./pants src/test/python/apache/aurora/common:test_cluster_option -s

Bugs closed: AURORA-595

Reviewed at https://reviews.apache.org/r/23817/
Fix filter spec for leader redirect.

Bugs closed: AURORA-584

Reviewed at https://reviews.apache.org/r/23779/
Fixing return value in _check_sla.
Also, adding extra logging in drainHosts RPC.

Bugs closed: AURORA-571

Reviewed at https://reviews.apache.org/r/23244/
Refactoring SchedulerCore (killTasks)

Bugs closed: AURORA-94

Reviewed at https://reviews.apache.org/r/23254/
Upgrade jersey version.

Reviewed at https://reviews.apache.org/r/23823/
Add --stacktrace to gradle build command.

Reviewed at https://reviews.apache.org/r/23776/
Documentation for task health checking and graceful shutdown.

Bugs closed: AURORA-574

Reviewed at https://reviews.apache.org/r/23316/
Merge branch 'master' into wickman/AURORA-587
Add some more tests to the announcer code.