Bind outside of the try block
Bind outside of the try block

If binding fails, we don't want to unbind
since there will be nothing bound, so do
the binding outside of the try/except
block to do this in the correct order.

Change-Id: Iebd3ea7a04265264043c47d4e943778538e8a153

junneyang/taskflow,junneyang/taskflow,varunarya10/taskflow,pombredanne/taskflow-1,pombredanne/taskflow-1,citrix-openstack-build/taskflow,jimbobhickville/taskflow,openstack/taskflow,openstack/taskflow,varunarya10/taskflow,jimbobhickville/taskflow,citrix-openstack-build/taskflow