Refs #5293 - Slight adjustment to MantidFramework.py

Allow for declareWorkspaceProperty([...] Type=ITableWorkspace) in
PythonAlgorithms - currently using it would raise an exception.

Code/Mantid/Framework/PythonAPI/MantidFramework.py

@@ -1586,7 +1586,7 @@ def declareWorkspaceProperty(self, PropertyName, WorkspaceName, Direction, Valid
             decl_fn = self._declareMatrixWorkspace
         elif Type == Workspace:
             decl_fn = self._declareWorkspace
-        elif Type == TableWorkspace:
+        elif Type == ITableWorkspace:
             decl_fn = self._declareTableWorkspace
         else:
             raise TypeError('Unrecognized type of workspace specified for property "' + PropertyName + '"')