Standardizing the Federation Process

Split functionality for attribute extraction and mapping layer
for saml2 auth plugin. Renamed to mapped.py, leaving original file
for backwards compatibility.

Co-Authored-By: Guang Yee <guang.yee@hp.com>
Implements: bp generic-mapping-federation

Change-Id: If9a8cbf62334c796a70e939bf00e7b194e5749c8
Sync Py2 and Py3 requirements files

bp python3

Change-Id: Ie6cd87bed5797bb9d845b0d9e9d0fa0410eab5c6
Merge "Sync Py2 and Py3 requirements files"
Merge "Standardizing the Federation Process"