Comment 21 for bug 1297560

You was right, the second router just created and not used (admin_state_up: false).
Actually the router1 (created by devstack) used by both stack, and both stack has a WaitCondition which needs to be signaled.
The cfn-signal commands needs to able to connect to the heat-cfn-api at the time when it is executed, now it is tried only once in the instance lifetime.

According to the curl manual the 7 exist code means:
"7 Failed to connect to host."