Moved console access and ServiceGroup config to Cloud Admin

Moved console access and ServiceGroup HowTo info from the CRG
to the CAG. Added memcache driver to ServiceGroup section. Brief
edits on all.

Partial-Bug: #1290687

Change-Id: I43e895279d5650c0489154c31ce03096ab9e61cc
Merge "Moved console access and ServiceGroup config to Cloud Admin"