fix #74
Fixed error noticed in PR #71
Seems like API behavior changed.
Error creating Cluster: googleapi: Error 400: The request was invalid: no automated backup policy was specified for secondary. Could not copy primary's configuration because an encryption key was present. Either explicitly disable the secondary's automated backup policy, or specify the policy with a CMEK.
fix #74 Fixed error noticed in PR #71 Seems like API behavior changed.