Replaced changed flag #424

[neiljohn-gh]

Fix for issue #424 (replaced state not showing correct changed flag when attachments are deleted)

Changelog:

• removed networks from diff_deploy if network deploy attribute is set to false in get_diff_replace
• added function to detach attachments and deploy the network before a delete to handle case when network is pending
• added retry count to wait_for_del_ready to prevent potential infinite loop (timeout is after 100 seconds)
• changed checking for del_ready from get network attachment to get network status
• fixed integration test templates to set deploy flag properly
• removed obsolete test case
• modified unit tests to match new endpoint

[mikewiebe]

@neiljohn-gh Looks like there are conflicts that need to be resolved. I will review once you address those. Thanks!

[mikewiebe]

@neiljohn-gh Nice job on this! This fixed a very critical issue that could be encountered in our solution collection. Tested many different scenarios and it worked very well!