Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Upgrade bazlets to latest stable-2.15 to build with 2.15.16 API
  Upgrade wiremock to 2.24.1
  Rename test for projects cache eviction test
  Upgrade bazlets to latest stable-2.15 to build with 2.15.15 API

Change-Id: I9d70744c93a40fcdcaf6d3b2e14485098e89478e