OSMENG-992 - Implement create model activity

in NS Workflow.

An exception is raised if model already exists

Change-Id: I0000f98e2d6c1b458d3234ac83594b9ce5c86f26
Signed-off-by: Patricia Reinoso <patricia.reinoso@canonical.com>
diff --git a/osm_common/dataclasses/temporal_dataclasses.py b/osm_common/dataclasses/temporal_dataclasses.py
index 953c95f..a0e3d19 100644
--- a/osm_common/dataclasses/temporal_dataclasses.py
+++ b/osm_common/dataclasses/temporal_dataclasses.py
@@ -365,9 +365,9 @@
 
 
 @dataclass
-class CreateModelInput:
+class ModelInfo:
     """
-    Input dataclass for creating a Juju Model.
+    Contains the information related to a model.
 
     Attributes:
     -----------
@@ -376,7 +376,7 @@
         collection in Mongo.
 
     model_name : str
-        Name of the model to create in Juju.
+        Name of the Juju model used to deploy charms.
     """
 
     vim_uuid: str