fixed several pep8 issues

  * E111 indentation is not a multiple of four
  * E113 unexpected indentation
  * E122 continuation line missing indentation or outdented
  * E128 continuation line under-indented for visual indent

Change-Id: I91babf85fd190849e3ee3272c7890d670c279e02
Make sure all the auth plugins agree on the shared identity attributes.

Note: this patch also corrected some of the external auth tests where an
auth request consists of two methods with two different identities.

Closes-Bug: #1299012

Change-Id: I5d7dd42d373879322823b16b215f11a015b734f8
Merge "Make sure all the auth plugins agree on the shared identity attributes."
Merge "fixed several pep8 issues"