Fix invalid syntax on heat-db-setup
Fix invalid syntax on heat-db-setup

">=" comparison is only supported in certain shells.  This patch changes
it to "-ge" to fix this.

Change-Id: I2bf1294c31d38e18b02bebd190bd4bfa45beedc5
Closes-Bug: #1398535

gonzolino/heat,maestro-hybrid-cloud/heat,pshchelo/heat,dragorosson/heat,steveb/heat,dims/heat,jasondunsmore/heat,steveb/heat,cryptickp/heat,cwolferh/heat-scratch,rdo-management/heat,maestro-hybrid-cloud/heat,noironetworks/heat,pratikmallya/heat,miguelgrinberg/heat,noironetworks/heat,takeshineshiro/heat,rh-s/heat,jasondunsmore/heat,dragorosson/heat,takeshineshiro/heat,gonzolino/heat,srznew/heat,rdo-management/heat,pshchelo/heat,openstack/heat,srznew/heat,rh-s/heat,pratikmallya/heat,miguelgrinberg/heat,cwolferh/heat-scratch,cryptickp/heat,dims/heat,openstack/heat