Update contribution guidelines to indicate target branch for PRs

Signed-off-by: Aram Price <aprice@pivotallabs.com>
Bump src/loggregator

Bump :
  John Tuley:
     [#65121514] Remove unnecessary test file
  Alex Jackson:
     bump loggregator lib to pick up new emitter code
     use etcd as a distributed cache for syslog drain information
     dont set TTL for app in etcd... rely on dump sink timeout for removal
     use copy of localhost certs as encoded []byte constants rather than generating files
     refactor sink_manager to use blacklist
     move tests to httptest #test-stability
     mark flaky test as pending
     use new test logger from loggregatorlib to not use real files when testing logging
     move message router to new pattern for input chans
     better manage sinks by auto matically unregistering them with Run() returns
     import new sinkmanager package
     remove empty function
     remove unused interface
     move sinkamanger to its own package
     more deterministic tests for syslog sink #test-stability
     remove usused test file
     move websocket server to its own package
     use more un-relialable hostname in DNS failure test #test-stability
     bail on tests early when failed
     refactored sinks
     test tests with ginkgo
     fix CI
     wip
  Matthew McNew:
     Update SyslogWriter Test to use HTTPtest
     Add Ginkgo to travis path
     updated ginkgo setup
     Kick Travis Build
     fixup merge conflict badness
     Merge branch 'wip_loggregator_stages'
     green tests with refactor
     Major refactoring, stability fixes
  Jared Carroll:
     Add assertion to flaky spec
  Dakota Bailey:
     Increase KeepAlive timeout to fix tests on slow Travis box
Bump src/collector

Bump cloudfoundry/collector:
  John Tuley:
     [#66065824] Listen for both "bad_requests" and "rejected_requests" from router ( Travis Success: https://travis-ci.org/cloudfoundry/collector/builds/19192300 )
Up timeout for requests to service broker to 70s

[Finishes #63937406]
Fix configuration bug with syslog_aggregator
Allow manifest stub to override nats templates (used to disable nats_stream_forwarder)
Create uaa client for cc service client creator and pass to cc config
[#58040510]

Conflicts:
	jobs/cloud_controller_ng/spec
	jobs/cloud_controller_ng/templates/cloud_controller_ng.yml.erb
Make cc_service_broker_client optional
Revert "Merge tag 'v159'"

This reverts commit e1ab3bcd69ee84aa1c40c15b821def8c489e82f4, reversing
changes made to a226fd78e971b26985b8121130bb8876acd3391a.
Merge branch 'deployed-to-prod' into develop
Revert "Revert "Merge tag 'v159'""

This reverts commit d40458d9da29a877fb87dee3859d88c4f0cfe729.
Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  David Stevenson and Zach Robinson:
     Merge branch 'master' of github.com:cloudfoundry/cloud_controller_ng ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/19352692 )
     Merge branch 'services-fork' ( Travis Unknown )
  Tammer Saleh:
     Rename job_name to job_name_in_configuration for clarity [#62361748] ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/19351750 )
  Ruth Byers:
     Use TimeoutJob wrapper in Enqueuer ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/19303620 )
  Eric Malm:
     Create TimeoutJob wrapper for Delayed::Job ( Travis Unknown )
  Alex Stupakov and Ryan Moran:
     Provides better error messages for validations ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/19204456 )
     Refactors ServiceInstance controller internals ( Travis Unknown )
     Adds endpoint for bulk updating service instances ( Travis Unknown )
  Christopher Jobst and Ryan Moran:
     Fix service_plan urls returned from spaces controller ( Travis Unknown )
     Adds new permissions endpoint for service instances ( Travis Unknown )
     Reduces possible test pollution from fake servers ( Travis Unknown )
     Change the error for non-unique service labels to match the desired error. ( Travis Unknown )
  Alex Stupakov and Matt Royal:
     v2 service labels are unique scoped to v2 services ( Travis Unknown )
  Matt Royal and Zach Robinson:
     Return the number of instances moved [#63080352] ( Travis Unknown )
  David Sabeti and Derek Richard:
     Show an error when service ids are not unique within a catalog ( Travis Unknown )
     Do not show duplicate error messages ( Travis Unknown )
     Add api doc specs for service_plans [finishes #61862446] ( Travis Unknown )
     Add services api spec for docs [#61862446] ( Travis Unknown )
     Rename dashboard_client_id to sso_client_id ( Travis Unknown )
  Zach Robinson and alex choi:
     Update error messages [#65060492] ( Travis Unknown )
     Brokers can have a uaa client created by requesting it in their catalog  [#58040510] ( Travis Unknown )
     Add dashboard_client_id to service model [#58040510] ( Travis Unknown )
  David Sabeti, Ryan Moran, Zach Robinson and alex choi:
     Add uaa client info to configuration [#58040510] ( Travis Unknown )
  David Sabeti, Matt Royal and alex choi:
     Add migration to reset service provider default for mysql ( Travis Unknown )
  Ryan Tang:
     Merge remote-tracking branch 'origin/master' into services-fork ( Travis Unknown )
  Matt Royal and alex choi:
     Merge remote-tracking branch 'origin/master' into services-fork ( Travis Unknown )
  Christopher Jobst and Matt Royal:
     Add 'purge' parameter to DELETE /v2/services/:guid ( Travis Unknown )
  David Sabeti and Ryan Moran:
     Do not export system_env_json with get /v2/app/:guid response [finishes #55332776] ( Travis Unknown )
  Matt Royal and Max Brunsfeld:
     /v2/services can be filtered by label and provider ( Travis Unknown )
  Kris Kelly:
     Add default value for maximum_app_disk ( Travis Unknown )
  Matt Royal and Ryan Moran:
     Update catalog, plan, service validation errors ( Travis Unknown )
Merge branch 'develop' of github.com:cloudfoundry/cf-release into develop
Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Abhijit Hiremagalur:
     Merge remote-tracking branch 'origin/pr/153' ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/19370327 )
  fraenkel:
     Return 204 (NO CONTENT) instead of 409 (CONFLICT) when the same build pack bits are uploaded.  Its not an error but an optimization that is OK. ( Travis Unknown )

Signed-off-by: Ruth Byers <rbyers@pivotallabs.com>
Fixing default compilation size for vsphere

Current sizing fails to compile buildpack_cache with no space left on device.
Reused sizing suggested into https://github.com/cloudfoundry/cf-docs/blob/master/source/docs/running/deploying-cf/vsphere/cloud-foundry-example-manifest.md.
Updating default compilation size to more conservative ones suggested by pivotal vsphere team

See https://github.com/cloudfoundry/cf-release/pull/288#issuecomment-35111444
Bump src/collector

Bump cloudfoundry/collector:
  John Tuley:
     [#66065824] Listen for both "bad_requests" and "rejected_requests" from router ( Travis Success: https://travis-ci.org/cloudfoundry/collector/builds/19192300 )
Merge branch 'master' into develop
Merge branch 'master' into develop
Revert "Revert "Bump src/cloud_controller_ng""

This reverts commit 8eee44b6fb8d3a7b55c9e3aa675fac96234c8cca.