Add domain and description to user for v3 identity

* splitting the changes seen in 27142 to a few new patches
* this one will just update v3 user to have description and domain

Change-Id: I9b4c365703da27e26ddc702f37cf5928e19cebdc
Fix identity v2.0 entry point

Change-Id: Ifae91a612fcd8b66660b93f6ea81d37e0f1bce1d
Merge "Add domain and description to user for v3 identity"
Merge "Fix identity v2.0 entry point"
Rename requires files to standard names.

Rename tools/pip-requires to requirements.txt and tools/test-requires
to test-requirements.txt. These are standard files, and tools in the
general world are growing intelligence about them.

Change-Id: I903213fda94a833335abaa7ad9a90bbb688ec15a
Fixes: bug #1179008