Format metadata from the server data format -> schema data format.

Since the google compute API uses optimistic locking, there is a chance we need to resubmit our updated metadata.

Update the metadata (serverMD) according to the provided diff (oldMDMap v newMDMap).

Provider returns a terraform.ResourceProvider.

Config is the configuration structure used to instantiate the Google provider.

ComputeOperationError wraps compute.OperationError and implements the error interface so it can be returned.

OperationWaitType is an enum specifying what type of operation we're waiting on.

SqlAdminOperationError wraps sqladmin.OperationError and implements the error interface so it can be returned.