add ec2 tests

Change-Id: Iced3eb8ca81c3b067496c3683f322b6e1dedec2a
Add Image v2 create command

* image create
* tests for v1 and v2 image create

Change-Id: I990dd84bf1a0cfeb368089adbea4010391647701
Update oslo incubator bits

* also remove cfg

Change-Id: I0ae9b9dc72ec88ed64a8c353b9c51734ee2cd24c
API commands

* add low-level API discovery support
test work

Change-Id: I0b2fd9d2a0103b42ec7cc4ed98d5bcfdec27c6fe
Merge branch 'oslo-clean' into dt-test
Merge branch 'image-v2-v2' into dt-test
Merge branch 'identity-ec2-tests' into dt-test