Fix NameError exception

The test_allocate_floating_ip can fail with "NameError:
name 'floating_ip_id_allocated' is not defined" if the
client.create_floating_ip call or response return fail.

Change-Id: I2db82ecf560c7d868ca9ab765a4fd751946b45f0
removes a duplicate volume type test

this change removes a volume type test basically duplicated by
another and also fixes an issue with the extra_specs param which
wasn't getted from config

Change-Id: Icc1454acfb167a6f7446a95eea748cca15a07d11
Merge "removes a duplicate volume type test"
Merge "Fix NameError exception"