tests: use safer test id generator.

- this should handle pure boolean ids

rhodecode/tests/__init__.py

@@ -236,7 +236,7 b' def no_newline_id_generator(test_name):'
     nicer output of progress of test
     """
     org_name = test_name
-    test_name = test_name\
+    test_name = str(test_name)\
         .replace('\n', '_N') \
         .replace('\r', '_N') \
         .replace('\t', '_T') \