OSMENG-987: Implement PrepareVnfWorkflow

Change-Id: If7a314a14439bb7ee25157d430d76f0628e121b7
Signed-off-by: Dario Faccin <dario.faccin@canonical.com>
diff --git a/osm_common/dataclasses/temporal_dataclasses.py b/osm_common/dataclasses/temporal_dataclasses.py
index 584b5dc..60dac4e 100644
--- a/osm_common/dataclasses/temporal_dataclasses.py
+++ b/osm_common/dataclasses/temporal_dataclasses.py
@@ -171,25 +171,12 @@
         The UUID of the VNF which is stored in the OSM vnfrs
         collection in Mongo.
 
-    """
-
-    vnfr_uuid: str
-
-
-@dataclass
-class PrepareVnfInput:
-    """
-    Input dataclass for workflow that prepares a VNF.
-
-    Attributes:
-    -----------
-    vnfr_uuid : str
-        The UUID of the VNF which is stored in the OSM vnfrs
-        collection in Mongo.
+    model_name: str
 
     """
 
     vnfr_uuid: str
+    model_name: str
 
 
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