Move identity v2 tests to their own folders

The V2 and V3 identity APIs are both full fledged interfaces. It makes
no sense to have the V2 tests populate the root of identity folders then
separate the V3 ones. They should be treated the same way.

Change-Id: I2688c29f1fd0b5057b7ff209701fbd5614b2f9d9
22 files changed