Merge branch 'release-0.21.0' into develop

* release-0.21.0:
  Bumping version to 0.21.0
Update direct connect test with latest API
Don't look at config file for region service tests

Otherwise these tests will fail if you have a region configured
in your config file.
Merge branch 'region-unit-test' into develop

* region-unit-test:
  Don't look at config file for region service tests
Expose result_keys on PageIterator object

This was expose on the Paginator object, but also needs to be
exposed through the PageIterator object.

Fixes #442.
Merge branch 'expose-result-keys-page-iter' into develop

* expose-result-keys-page-iter:
  Expose result_keys on PageIterator object
Bumping version to 0.22.0
Merge branch 'release-0.22.0'

* release-0.22.0:
  Bumping version to 0.22.0
  Expose result_keys on PageIterator object
  Don't look at config file for region service tests
  Update direct connect test with latest API