* stable-2.14:
AbstractElasticIndex: Don't mention "change" in exception message
Consistently import org.slf4j.LoggerFactory
PluginLoader: Make Logger private
Documentation: clarify latest IntelliJ version use
Elasticsearch builders: fix the Eclipse warnings
Remove stale references to no longer used jackson libraries
Add 'docker' tag to build rules for Elasticsearch tests
ReindexIT: Split Elasticsearch test out to a separate class
Due to change I7c1461c45 ("ReindexIT: Split Elasticsearch test out to
a separate class") it is now possible to re-introduce the other changes
that were reverted in previous merges from stable-2.14 to stable-2.15:
- Iccf443102 ("Acceptance tests: Replace embedded ES with docker
testcontainer")
- I57e5d0718 ("Acceptance tests: Remove ES bootstrap boilerplate")
Although the reindex tests for Elasticsearch still don't work on the
stable-2.15 branch (issue 8799), they are now isolated in their own
class and the tests can be skipped using the @Ignore annotation.
Change-Id: Ia19ea3fc68d80e0d20ff3cbed2baa49981db401e
24e7484fd4