Complete basic test infrastructure

This finally gets all of the API tests into a common framework regarding
test classes and so forth.

Change-Id: If675347129c50dcba0bfc5b6c58f5a2ca57ff46c
Add server image create command

Translation of 'nova image-create', with tests!

Change-Id: I8a833aeff6f291e4774063ed235876eb2ba9c13c
Merge "Complete basic test infrastructure"
Merge "Add server image create command"