Removing gate test for py2.6
Removing gate test for py2.6

Zaqar client is not supported python2.6 .
So this patch removes gate test for py2.6 .

Change-Id: I7316b5a8fa67af75f2957d15bf3b28f7a7b2db44
Partial-Bug: #1519510

dongwenjuan/project-config,openstack-infra/project-config,openstack-infra/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,noorul/os-project-config,noorul/os-project-config,Tesora/tesora-project-config