Update the open db's test to check failure.
Update the open db's test to check failure.

Damien made a good point that we should check that the error is generated as expected before waiting as necessary for the active db's to go idle.



git-svn-id: c1f8a8ec0b3bb2e99ab3413722f81f687760e79c@884344 13f79535-47bb-0310-9956-ffa450edef68

apache/couchdb-futon,apache/couchdb-futon