Merge branch 'stable-2.15'
* stable-2.15:
AbstractElasticIndex: fix index name of delete request and add coverage
Bazel: Remove unused commons-lang3
DropWizardMetricMaker: Move sanitizeMetricName to MetricMaker base class
Update git submodules
Update git submodules
Update git submodules
AsciiDoctor: Format with google-java-format version 1.6
Enable metrics for core queues
WorkQueue: Add possibility to enable metrics
Change I7af2f9f6c ("Bazel: Remove unused commons-lang3") is reverted by
this merge since commons-lang3 is actually still used on master.
This reverts commit 51c938d39c5933f6f9e717f260a3f25303398f00.
Change-Id: I5ea8c03d27e7eaefd0067658b25d1c08efdfd0f4