add ec2 tests

Change-Id: Iced3eb8ca81c3b067496c3683f322b6e1dedec2a
Do basic Identity discovery

Change-Id: I3c02e3c6b3519fbd060be140a05f6b1a2f412645
Merge branch 'compute-test-fix' into dt-test
Merge branch 'basic-discovery' into dt-test
Merge branch 'identity-ec2-tests' into dt-test