Added OVSVAPP_MODE=manual in devstack
Added OVSVAPP_MODE=manual in devstack

Change-Id: I7c66af1511fdb92bc96279836e5263f8595e895f

VTabolin/networking-vsphere,stackforge/networking-vsphere,ekosareva/vmware-dvs,VTabolin/networking-vsphere,ekosareva/vmware-dvs,stackforge/networking-vsphere,ekosareva/networking-vsphere,ekosareva/networking-vsphere,Mirantis/vmware-dvs,openstack/networking-vsphere,openstack/networking-vsphere,Mirantis/vmware-dvs