Add soft delete mixin to ResourceProperty

Was not included as part of rebase

Change-Id: I021775ec5633415ff0ea220480c30019312028e0

blazar/db/sqlalchemy/models.py

@@ -188,7 +188,7 @@ def to_dict(self):
         return super(Event, self).to_dict()
 
 
-class ResourceProperty(mb.BlazarBase):
+class ResourceProperty(mb.BlazarBase, mb.SoftDeleteMixinWithUuid):
     """Defines an resource property by resource type."""
 
     __tablename__ = 'resource_properties'