Elizabeth K. Joseph 07fd18e754 Add instructions for vgcreate to sysadmin docs
The current sysadmin.html assumes there is a volume group (vg) present
when adding a new cinder volume. On a new server a vg won't exist, adding
instructions for how to add it.

Change-Id: I3171819fb5aea8a5edfab28f29ba35f9d0f5d461
2015-02-26 16:48:41 -08:00
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