Try to re-enable the enum tests

Author: CJCombrink

test/py/RunClientServer.py

@@ -286,9 +286,6 @@ def main():
         if gp_dir == 'type_hints' and (sys.version_info < (3,7)):
             print('Skipping \'type_hints\' test since python 3.7 or later is required')
             continue
-        if gp_dir == 'enum' and (sys.version_info < (3,7)):
-            print('Skipping \'enum\' test since python 3.7 or later is required')
-            continue
         generated_dirs.append('gen-py-%s' % (gp_dir))
 
     # commandline permits a single class name to be specified to override SERVERS=[...]