Fix bash error in raally-gate script
Fix bash error in raally-gate script

Now in the logs you may see http://goo.gl/T4CDzZ
line 58: [: : integer expression expected

This is because in bash operator = should be used for comparing
string values and -eq for integer

Change-Id: I7ac659af47bfe70b48600546535d72aa1f9363df

gluke77/rally,gluke77/rally,gluke77/rally,vganapath/rally,vganapath/rally,vganapath/rally,openstack/rally,yeming233/rally,openstack/rally,vganapath/rally,yeming233/rally,gluke77/rally,openstack/rally,openstack/rally