Add a has_interface() method to the resource class

This is to better indentify resource types, given that they
can be mapped in the environment.

Change-Id: I6dd552c87b80eb34baec306acd663657ee929b30
Use the global environment to map Quantum to Neutron

Change-Id: Id3ccc0538d79955d0112daf37bcd80dce78a0373
Merge "Add a has_interface() method to the resource class"
Merge "Use the global environment to map Quantum to Neutron"