Add a tests for service clients
Add a tests for service clients

Now we are trying to migrate service clients to tempest-lib,
and we need to check all arguments of each service client work
fine as library functions.
This patch adds a test for doing it.

There is data_utils module in Tempest for generating random
data, but this test doesn't use it because this test will be
moved to tempest-lib in the future and we are not sure whether
data_utils also is moved or not.

Note:
  If adding migrated client to test_clients which is added by
  this patch on each migration patch, we can test each client
  migration after this patch.

Change-Id: Ic6e1efd6ff9931e16a4ba490ef4aba4a23f71370

zsoltdudas/lis-tempest,hayderimran7/tempest,xbezdick/tempest,redhat-cip/tempest,rakeshmi/tempest,xbezdick/tempest,Vaidyanath/tempest,LIS/lis-tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,izadorozhna/tempest,izadorozhna/tempest,danielmellado/tempest,Tesora/tesora-tempest,Juniper/tempest,NexusIS/tempest,neerja28/Tempest,Juniper/tempest,flyingfish007/tempest,jaspreetw/tempest,jaspreetw/tempest,Vaidyanath/tempest,tonyli71/tempest,hpcloud-mon/tempest,masayukig/tempest,CiscoSystems/tempest,manasi24/tempest,eggmaster/tempest,akash1808/tempest,masayukig/tempest,afaheem88/tempest,manasi24/tempest,roopali8/tempest,Tesora/tesora-tempest,Juraci/tempest,rakeshmi/tempest,Juraci/tempest,hayderimran7/tempest,danielmellado/tempest,vedujoshi/tempest,manasi24/jiocloud-tempest-qatempest,manasi24/jiocloud-tempest-qatempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,openstack/tempest,alinbalutoiu/tempest,bigswitch/tempest,rzarzynski/tempest,tonyli71/tempest,pczerkas/tempest,roopali8/tempest,zsoltdudas/lis-tempest,rzarzynski/tempest,dkalashnik/tempest,neerja28/Tempest,LIS/lis-tempest,sebrandon1/tempest,varunarya10/tempest,jamielennox/tempest,tudorvio/tempest,yamt/tempest,varunarya10/tempest,CiscoSystems/tempest,yamt/tempest,cisco-openstack/tempest,JioCloud/tempest,nunogt/tempest,pczerkas/tempest,redhat-cip/tempest,pandeyop/tempest,sebrandon1/tempest,afaheem88/tempest,flyingfish007/tempest,akash1808/tempest,pandeyop/tempest,hpcloud-mon/tempest,openstack/tempest,eggmaster/tempest,alinbalutoiu/tempest,nunogt/tempest,dkalashnik/tempest,vedujoshi/tempest,NexusIS/tempest,JioCloud/tempest,jamielennox/tempest,bigswitch/tempest,tudorvio/tempest,cisco-openstack/tempest