Fix typo in baremetal_group & AuthGroup of config.py
Fix typo in baremetal_group & AuthGroup of config.py

"parameters" was mis-spelled as "paremeters"
"usable" was mis-spelled as "useable"

Change-Id: If33f5cc8472737227606d563ad949b9b3de78ad5
Closes-Bug: #1489417

xbezdick/tempest,Juniper/tempest,zsoltdudas/lis-tempest,bigswitch/tempest,Juniper/tempest,masayukig/tempest,vedujoshi/tempest,Tesora/tesora-tempest,zsoltdudas/lis-tempest,masayukig/tempest,xbezdick/tempest,rakeshmi/tempest,izadorozhna/tempest,cisco-openstack/tempest,sebrandon1/tempest,Tesora/tesora-tempest,cisco-openstack/tempest,tonyli71/tempest,sebrandon1/tempest,rakeshmi/tempest,openstack/tempest,bigswitch/tempest,vedujoshi/tempest,LIS/lis-tempest,openstack/tempest,LIS/lis-tempest,izadorozhna/tempest,tonyli71/tempest