Register EMC config options globally

The registration allows the oslo sample config generator
to detect the config options and extract automatically
a config template.

Change-Id: Ib181d734dddbd9b6a664439286969b832d6536e7
Merge "Register EMC config options globally"
(Test commit) Change README to reflect Jio's fork of Cinder

Change-Id: I3f26c0a736e63725aec24ca2fa12c707b8e6460f