[NRRPLT-4884] Load brain file for frontend.

The CLE no longer loads the brain module in terms of PyNN, but it
still needs to load the brain file source for the frontend to display.

Change-Id: I3cd7833387f6e542a05a29e651b38cf2031b6c54

hbp_nrp_music_interface/hbp_nrp_music_interface/cle/MUSICPyNNControlAdapter.py

@@ -28,6 +28,12 @@ class MUSICPyNNControlAdapter(PyNNControlAdapter):
         """
         self.__load_music_brain_proxies(**populations)
 
+        # load the brain source for the frontend to display, copied from parent class
+        logger.info("Saving brain source")
+        import hbp_nrp_cle.tf_framework.config as tf_config
+        with open(network_file) as source:
+            tf_config.brain_source = source.read()
+
     @staticmethod
     def __load_music_brain_proxies(**populations):
         """

hbp_nrp_music_interface/hbp_nrp_music_interface/tests/cle/test_control_adapter.py

 import unittest
 
 from hbp_nrp_music_interface.cle.MUSICPyNNControlAdapter import MUSICPyNNControlAdapter
+import hbp_nrp_cle.tf_framework.config as tf_config
 
-from mock import Mock, patch
+from mock import Mock, patch, mock_open
 import os
 
 
@@ -22,9 +23,17 @@ class TestControlAdapter(unittest.TestCase):
       @patch('os.environ.get', return_value='')
       @patch('hbp_nrp_music_interface.cle.MUSICBrainLoader.load_proxies_from_xml')
       def test_valid_xml(self, mocked_setup, mocked_environ, mocked_load):
-          mc = MUSICPyNNControlAdapter()
-          mc.load_brain('foo.xml')
+        
+          m = mock_open()
+          m.return_value.read.return_value = 'mock brain source'
+
+          with patch('__builtin__.open', m, create=True):
+              mc = MUSICPyNNControlAdapter()
+              mc.load_brain('foo.xml')
+
           mocked_environ.assert_called_once_with('NRP_MUSIC_DIRECTORY')
+          m.assert_called_once_with('foo.xml')
+          self.assertEquals(tf_config.brain_source, 'mock brain source')
 
 if __name__ == "__main__":
     unittest.main()