Merge branch 'stable-2.16' into stable-3.0 * stable-2.16: DeletePreconditionsTest: Replace ExpectedException with assertThrows Bump Bazel version to 2.0.0 Upgrade bazlets to latest stable-2.16 to build with 2.16.15 API Upgrade bazlets to latest stable-2.16 to build with 2.16.14 API Change-Id: I4105e50460505dee4ab392dcc55b97860f26b8ce