Revert "Revert "Re-enabled a PLDA test that has been disabled""

This reverts commit 8dfe578d

bob/learn/em/test/test_plda_trainer.py

@@ -317,7 +317,7 @@ class PythonPLDATrainer():
       i += 1
 
 
-def notest_plda_EM_vs_Python():
+def test_plda_EM_vs_Python():
 
   # Data used for performing the tests
   # Features and subspaces dimensionality