Modify "Add Valid Host" tests for host keys
Modify "Add Valid Host" tests for host keys

Fix existing tests to handle the delegate host key window that pops
up after adding a new host.

control-center/serviced,control-center/serviced,control-center/serviced,control-center/serviced,control-center/serviced,control-center/serviced,control-center/serviced,control-center/serviced