This migrates the above files from tempest. This includes tempest commits:
* quotas_client.py: Idd8afb1bcfc1b0165b1e967a991d4705ff182249
* test_quotas_client.py: I3ad6761651cec5e66012d08e6b63322f53286a5c
* quotas.py: Ica929c402a3d042ae751302384e68853eb28b405
to see the commit history for these files refer to the above Change-Ids in the tempest repository
Partially implements blueprint migrate-service-clients-to-tempest-lib
Change-Id: Ib0fcb82ce09ea68d9899836264e8037ac977347b