Support flavor sync with accesses info
Support flavor sync with accesses info

When launching, reboot or resize a instance, if the flavor's accesses
is changed in cascading, then the modification will be synced to the
cascaded.

Change-Id: I54f0496c9841417966537faeee071ac309b8042d

stackforge/tricircle,openstack/tricircle,openstack/tricircle,stackforge/tricircle