Update bazlets to latest revision on stable-2.15
Update bazlets to latest revision on stable-2.15

- Adjust names of prolog dependencies
- Add optional dir_name argument to gerrit_plugin
- gerrit_plugin: Improve stamping error message
- Upgrade Gerrit API to version 2.15.2
- Set Gerrit API snapshot version to 2.15.2-SNAPSHOT
- Fix the error in project properties generation file
- Switch to 2.14.9-SNAPSHOT Gerrit API version for local dev
- Fix deletion of Sonar Scanner folder
- Automate SonarQube analysis for plugins built with bazel
- Use bazel-cache instead of buck-cache
- Use bazel-cache instead of buck-cache
- Update Gerrit API to 2.14.8
- Upgrade API version to 2.15.1
- Upgrade API version to 2.15 final release
- Set Gerrit API snapshot version to 2.14.8-SNAPSHOT
- Update Gerrit API to 2.14.7
- project.py: Python 3 compatibility
- Use release API version 2.15-rc3
- Bump GWT to 2.8.2
- Exclude GWT library from gerrit_plugin_gwtui artifact
- Exclude GWT library from gerrit_plugin_gwtui artifact
- [project.py] Add bazel --batch option
-  [project.py] Fix typo
- Set Gerrit API version to 2.15-rc2
- Fix indentation
- Add Prolog skylark rule
- Set gerrit maven local api to version 2.14.7-SNAPSHOT
- Update API to 2.14.6
- Upgrade Gerrit API to 2.14.5.1
- Set Gerrit API version to 2.15-rc1

Change-Id: Ieb7f5c059d4b9c9f78c82714863b69dee556c3d0

GerritCodeReview/plugins_javamelody,GerritCodeReview/plugins_javamelody,GerritCodeReview/plugins_javamelody