Add missing package dependency for test_requirements.txt
Add missing package dependency for test_requirements.txt

Packages of fixtures are used,
but missing in test_requirements.txt

Close-bug: #1235524
Change-Id: Iab154bf420036e049c41754678e7c1b67c3bd7e6

citrix-openstack-build/sahara,xme1226/sahara,ekasitk/sahara,matips/iosr-2015,redhat-openstack/sahara,openstack/sahara,zhujzhuo/Sahara,mapr/sahara,ekasitk/sahara,matips/iosr-2015,tellesnobrega/sahara,bigfootproject/sahara,citrix-openstack-build/sahara,tellesnobrega/sahara,henaras/sahara,tellesnobrega/storm_plugin,henaras/sahara,crobby/sahara,egafford/sahara,zhujzhuo/Sahara,bigfootproject/sahara,esikachev/sahara-backup,crobby/sahara,redhat-openstack/sahara,redhat-openstack/sahara,keedio/sahara,henaras/sahara,egafford/sahara,tellesnobrega/storm_plugin,matips/iosr-2015,crobby/sahara,citrix-openstack-build/sahara,esikachev/scenario,xme1226/sahara,esikachev/sahara-backup,zhangjunli177/sahara,mapr/sahara,zhangjunli177/sahara,esikachev/scenario,esikachev/sahara-backup,keedio/sahara,xme1226/sahara,mapr/sahara,tellesnobrega/storm_plugin,zhangjunli177/sahara,keedio/sahara,esikachev/scenario,ekasitk/sahara,zhujzhuo/Sahara,openstack/sahara,bigfootproject/sahara