add ec2 tests

Change-Id: Iced3eb8ca81c3b067496c3683f322b6e1dedec2a
Add Image v2 create command

* image create
* tests for v1 and v2 image create

Change-Id: I990dd84bf1a0cfeb368089adbea4010391647701
API commands

* add low-level API discovery support

Change-Id: Id390a3b523fd734a83d9df97817a06caced549d2
add some tests

Change-Id: I22a2b220708a87befe2071850ff43bea066fba82
Rename lib_api to api_version

Change-Id: If98b41884c4f6c718e5104943acbaa9d381231be
Fix pep8

Change-Id: Ice024f00365920a1d22c39229334d9ea176bffb8
another rename fix

Change-Id: I2f7234dfcd6ac9372cffac55f59737234ccc5bd7
Merge branch 'oslo-clean' into dt-test
Merge branch 'image-v2-v2' into dt-test
Merge branch 'identity-ec2-tests' into dt-test