utils: update 'normalise_organism_name'.

Update the 'normalise_organism_name' to convert all non-alphanumeric characters to underscores.

Author: pjbriggs

auto_process_ngs/test/test_utils.py

@@ -1386,6 +1386,7 @@ def test_normalise_organism_name(self):
                          "mus_musculus")
         self.assertEqual(normalise_organism_name(" Mus  musculus "),
                          "mus_musculus")
+        self.assertEqual(normalise_organism_name("C. elegans"), "c_elegans")
 
 class TestSplitUserHostDir(unittest.TestCase):
     """Tests for the split_user_host_dir function

auto_process_ngs/utils.py

@@ -1100,9 +1100,9 @@ def normalise_organism_name(name):
       String: normalised organism name
     """
     # Make lowercase, split on commas and replace whitespace
-    # with single underscore, then strip leading/trailing
-    # underscores
-    return re.sub(r'\s+','_',str(name).lower()).strip('_')
+    # and other non-alphanumeric characters with single underscore,
+    # finally strip leading/trailing underscores
+    return re.sub(r'\W+','_',str(name).lower()).strip('_')
 
 def split_user_host_dir(location):
     # Split a location of the form [[user@]host:]dir into its