Add --list-stages argument to full_test_suite.py

qa/zcash/full_test_suite.py

@@ -171,10 +171,17 @@ def run_stage(stage):
 
 def main():
     parser = argparse.ArgumentParser()
+    parser.add_argument('--list-stages', dest='list', action='store_true')
     parser.add_argument('stage', nargs='*', default=STAGES,
                         help='One of %s'%STAGES)
     args = parser.parse_args()
 
+    # Check for list
+    if args.list:
+        for s in STAGES:
+            print(s)
+        sys.exit(0)
+
     # Check validity of stages
     for s in args.stage:
         if s not in STAGES: