Augment postman neutron collection and added FloatingIPHandler skeleton.

Added more crud operations to postman neutron collection: floating ip.
Added FloatingIPHandler (which will be needed for L3 forwarding feature).

Change-Id: I91fa7accdc5ffc8561e886195d51d177ce95412c
Signed-off-by: Flavio Fernandes <ffernand@redhat.com>
Merge "Augment postman neutron collection and added FloatingIPHandler skeleton."