Merge branch 'stable-2.15'
* stable-2.15:
Upgrade bazlets to latest stable-2.15 to build with 2.15.7 API
Upgrade bazlets to latest stable-2.14 to build with 2.14.17 API
Upgrade bazlets to latest stable-2.15 to build with 2.15.6 API
Upgrade bazlets to latest stable-2.14 to build with 2.14.16 API
Align Eclipse compiler settings with core Gerrit's
bazlets: Replace native.git_repository with skylark rule
Upgrade bazlets to latest stable-2.14 to build with 2.14.15 API
Change-Id: Iee8eec6edfa991202d91fab7cb1c006cea7bff2d