Add docs for first_ip_address on sql db instance. (#1143)
Add docs for first_ip_address on sql db instance. (#1143)

* Add docs for first_ip_address on sql db instance.

* Clarify the usecase for this attribute.

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