Below are some of the improvements madein this patch for the
Openstack APIC fields in Network, Subnet, Router and Address Scope:
1. Added more descriptive help messages for the apic fields.
2. More user friendly approach to handle dictionary and list elements.
3. Removal of some fields from the set commands.
Change-Id: I50ef5bc56241d0036f2fba3e650c63a7d3539808