make disassociate_address mock idempotent, by not requiring instance data
Merge pull request #2596 from mikehale/disassociate_address_mock_fix

Make disassociate_address mock idempotent, by not requiring instance data
Merge branch 'master' of github.com:fog/fog into ssh_host
[core] updating ssh_ip_address to take a block in order to defer address specification to execution time.