Fix exercises for Trove
Fix exercises for Trove

Reasons:
 - trove.sh should use native python client to exercise Trove API

Changes:
 - adding datastore and datastore version exercises

Change-Id: I041465e5bda6ad9ec3f597ecc290612b8baef09c
Closes-Bug: #1346743

samgoon/devstack,pacinete/devstack,vsham20/devstack,j4/devstack,herrsechs/devstack,nuxeh/devstack,openstack-dev/devstack,parul24/devstack,bljgaurav/openstack-test,mmasaki/devstack,noironetworks/devstack,neerja28/Devstack_GlusterFS,thomasem/devstack,andrewrothstein/devstack,sequenceiq/devstack,costingalan/devstack,nawawi/openstack,olivierlemasle/devstack,rushiagr/devstack,kplus/devstack-moonshot,flavio-fernandes/devstack,sequenceiq/devstack,group-policy/devstack,upadhyay-prashant/devstack,dirkmueller/devstack,nawawi/openstack,bswartz/devstack,affo/devstack,herrsechs/devstack,tianweizhang/devstack,LoHChina/devstack,andrewrothstein/devstack,BSJAIN92/OpenStack,bljgaurav/openstack-test,TwinkleChawla/devstack,avvocatodemarchis/devstack,j4/devstack,mssumanth/devstack,atulpatil301/devstack,virtualopensystems/devstack,upadhyay-prashant/devstack,eharney/devstack,openstack-dev/devstack,richliu/devstack,NaokiMiyata/devstack,varunarya10/devstack,bigswitch/devstack,pombredanne/devstack,neerja28/Devstack_GlusterFS,Mahito/devstack,avvocatodemarchis/devstack,sc68cal/devstack,nuxeh/devstack,group-policy/devstack,vishnugonela/devstack,CloudServer/devstack,promptworks/devstack,innodee/openstackk,olivierlemasle/devstack,prithivm/branch01,TwinkleChawla/devstack,pczerkas/devstack,pacinete/devstack,LoHChina/devstack,prithivm/branch01,costingalan/devstack,vsham20/devstack,bswartz/devstack,mc2014/devstack,dtroyer/devstack,bq-xiao/devstack,pczerkas/devstack,mmasaki/devstack,NaokiMiyata/devstack,varunarya10/devstack,mc2014/devstack,vishnugonela/devstack,ozamiatin/devstack,promptworks/devstack,dirkmueller/devstack,rushiagr/devstack,wenhuizhang/devstack,dtroyer/devstack,affo/devstack,pombredanne/devstack,HPCHub/devstack,sc68cal/devstack,parul24/devstack,thomasem/devstack,bq-xiao/devstack,richliu/devstack,tianweizhang/devstack,eshnil2000/devstack,liuquansheng47/devstack,BSJAIN92/OpenStack,bigswitch/devstack,samgoon/devstack,wenhuizhang/devstack,ozamiatin/devstack,eharney/devstack,Mahito/devstack,flavio-fernandes/devstack,mssumanth/devstack,atulpatil301/devstack,HPCHub/devstack,liuquansheng47/devstack,kplus/devstack-moonshot,noironetworks/devstack,CloudServer/devstack