Since the branch name doesn't always correspond to the milestone name,
eg, master.

See gh-20680

Closes gh-20862

This is done by checking for existing issues only in the milestone
corresponding to the current branch. For issues, the milestone is assigned
at the time of issue creation. For PRs, since the branch is different the
milestone can be derived from that while triaging the issue.

Closes gh-20680

This property is a left-over and was never used in Micrometer so this
commit deprecates its use so that it can be removed in the next feature
release.

Closes gh-20835

This commit fixes the AtlasProperties hierarchy so that it no longer is
a StepRegistryProperties. The AtlasConfig on the Micrometer side of
things does not share the common config hierarchy either and some
properties have different default and lifecycle.

Closes gh-20843

Closes gh-20803

* pr/20756:
  Upgrade to Docker 19.03.8 in CI

Closes gh-20756

See gh-20756

Closes gh-20801

* pr/20793:
  Harmonize issue title for auto-created Docker upgrade issues

Closes gh-20793

See gh-20793

If a PR with the given title exists, we clone the existing PR branch so
that it doesn't get overridden by master.

See gh-20530

See gh-20530

See gh-20530

Closes gh-20752

* pr/20530:
  Polish "Automate Docker update in CI"
  Automate Docker updates in CI

Closes gh-20530

See gh-20530

See gh-20530

* gh-20727:
  Polish "Make it clear to which type the DataSource properties are bound"
  Make it clear to which type the DataSource properties are bound

Closes gh-20727

See gh-20727

See gh-20727

* gh-20708:
  Polish GroovyTemplateAutoConfiguration

Closes gh-20708

See gh-20708

* gh-20676:
  Polish "Use @DynamicPropertySource for Neo4J and Redis data tests"
  Use @DynamicPropertySource for Neo4J and Redis data tests

Closes gh-20676

See gh-20676

See gh-20676

Closes gh-20725

Closes gh-20719

Closes gh-20717

This commit is a follow-up of gh-20709 to apply the same consistency
level to the Cassandra reactive health indicator.

Closes gh-20713

Closes gh-20711

* pr/20709:
  Polish "Use LOCAL_ONE when querying system.local"
  Use LOCAL_ONE when querying system.local

Closes gh-20709