Neutron dep for nova_admin_tenant_id_setter

The nova_admin_tenant_id_setter class internally generates a
neutron_config resource that isn't collected by the normal
Neutron_Config collector.  This means we need an explicit dependency
between the neutron package and any nova_admin_tenant_id_setter
resources, to ensure that the config files exist.

Change-Id: I713bd6a9cc496947f10faa3ccc67f8362c872839
add config for caching metadata in memory

* add config metadata_memory_cache_ttl to enable caching metadata
in memory
* set default to 5 as project neutron/master

Change-Id: Ib6a05ae5033c53c4196f736373752370012d82a6
Merge "Neutron dep for nova_admin_tenant_id_setter"
Merge "add config for caching metadata in memory"