Removing tests from units that are now implemented in the new upgraded test system.  Once
we're a little further along the units directory will be reserved to pure-API tests.
Various tests using datafiles are being moved into the integration test framework (tests_new right now).

The unit test infrastructure will remain for things that are mocked out and testable with out filesystem
side effects, and a few cases of things that might not be quite so much (like inventory) that can still
benefit from heavy access to the API.

See the 'tests_new/integration' directory, this will soon fold into tests_new.
Move inventory tests into subdir, prune non-integration tests.
Adding a new test for the ping module
Add data test for ping
Move integration tests into tests_new.
Rename tests to test, use old directory name.
reconnect unit tests to 'make tests'
Update README.md
fix json typo
Make sure droplet deletion works even when idempotency is achieved using 'name' and 'unique_name' rather than 'id'
Added ansible-vault to the installer
Merge pull request #6103 from bryfry/patch-1

fix json typo in documentation
Merge pull request #6105 from tonk/with_vault

Added ansible-vault to the installer
Add async test role
Add handlers test
Add test for basic lookups
Update README.md

Minor readme tweaks since I haven't edited this in a while.
Update README.md
Add iterator tests