Fix the database sweeper.
Fix the database sweeper.

It's getting hung up on a database replica instance that's not running,
so it can't stop it.

To resolve, we're only trying to stop replica instances that are in a
running state. Also, I noticed a bug that we'd try to delete replicas
twice, so I fixed that, as well.

ubschmidt2/terraform-provider-google,hashicorp/terraform-provider-google-beta,ubschmidt2/terraform-provider-google,rosbo/terraform-provider-google,hashicorp/terraform-provider-google,rosbo/terraform-provider-google,hashicorp/terraform-provider-google-beta,terraform-providers/terraform-provider-google,hashicorp/terraform-provider-google,drebes/terraform-provider-google,drebes/terraform-provider-google,hashicorp/terraform-provider-google,terraform-providers/terraform-provider-google,hashicorp/terraform-provider-google-beta,rosbo/terraform-provider-google,drebes/terraform-provider-google,terraform-providers/terraform-provider-google,rosbo/terraform-provider-google,hashicorp/terraform-provider-google-beta,hashicorp/terraform-provider-google,terraform-providers/terraform-provider-google,drebes/terraform-provider-google,ubschmidt2/terraform-provider-google,ubschmidt2/terraform-provider-google,terraform-providers/terraform-provider-google