if OPENSTACK_NEUTRON_NETWORK["enable_quotas"] = False buttons will not appear
and exceptions are thrown. This is because a dict is searched for a key
("available") which wont be there if its disabled. This generates a
KeyError at runtime.
As currently written enable_quatas -> False essentially disables Neutron usage.
This is not a desirable outcome.
This patch shows Neutron related buttons and ignores the quota settings,
which seems more in line with the notion of disabling quotas.
Closes-Bug:#1482354
Change-Id: I9485ddeece74d87317c2587498f5f79d4ffdb66e
5ba219acbf