add method to get Terraform provider configuration

kypo/cloud_commons/cloud_client_base.py

@@ -9,6 +9,15 @@ class KypoCloudClientBase(ABC):
     """
     Base class for KYPO cloud clients.
     """
+    @abstractmethod
+    def get_terraform_provider(self) -> str:
+        """
+        Get OpenStack Terraform provider
+        :return: Terraform provider template
+        :raise InvalidTopologyDefinition: Terraform provider template is incorrect
+        """
+        pass
+
     @abstractmethod
     def create_terraform_template(self, topology_instance: TopologyInstance, *args, **kwargs)\
             -> str: