Merge branch 'stable-3.1'
* stable-3.1:
Fix bazlets using latest stable-3.1 to build with 3.1.5 API
Adapt documentation link to v3.1 in README for e2e
Replace unused postgresql jar with manual site copy
Align postgresql version used with gerrit core one
Stop shipping core dependencies within plugin jar
Sort CONDUCTOR_DEPS and EXECUTOR_DEPS alphabetically
Adapt documentation version link in README for e2e
Add README introducing e2e plugin test scenarios
Upgrade bazlets to latest stable-3.1 to build with 3.1.5 API
Upgrade bazlets to latest stable-3.0 to build with 3.0.9 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.19 API
Align postgresql version used with gerrit core one
Stop shipping core dependencies within plugin jar
Sort CONDUCTOR_DEPS and EXECUTOR_DEPS alphabetically
Change-Id: I94e99866852d33e5038533a2725f55488616ff93
