Closes gh-20376

Closes gh-20375

* pr/20361:
  Upgrade CI images to Ubuntu Bionic 20200219

Closes gh-20361

See gh-20361

Closes gh-20359

Closes gh-20358

* pr/20355:
  Automate Ubuntu base image upgrade

Closes gh-20355

See gh-20355

* pr/20354:
  Polish "Add descriptions for data source pool metrics"
  Add descriptions for data source pool metrics

Closes gh-20354

See gh-20354

See gh-20354

* pr/20318:
  Polish tests

Closes gh-20318

See gh-20318

Translate IOException to DockerException for a more meaningful error
message when the Docker daemon is not available.

Fixes gh-20151

Closes gh-20340

* pr/20339:
  Remove redundant code

Closes gh-20339

See gh-20339

See gh-20329

Closes gh-20331

Closes gh-20329

This commit fixes problems with file path separators and command
line argument quoting in Maven plug integration tests when run on
Windows.

Fixes gh-20244

Closes gh-20330

Closes gh-20328

Closes gh-20327

Closes gh-20326

Closes gh-20325

Closes gh-20203