AZ support for cells

Change-Id: Ie32508be5a903bbd493ba761066677bd1775f67e
Support consoleauth at child cells
Restricted and direct only cell scheduler filters

Change-Id: I38a1a5c1fa90c9ec26ad9184deb0aa60f72abebf
Added scheduler filter to filter on hosts in aggregates that have
instance_name keys. These must match the requested instance_type.
(cherry picked from commit ed5d31011ddcee43cfd59df612fe3ebf2febe76c)

Signed-off-by: Kieran Spear <kispear@gmail.com>
Support flavor create call with cells

Change-Id: I695963448122e6c9951fc45e7b9e5fea0fd01b1f