use default settings from ansible.cfg

lib/ansible/cli/__init__.py

@@ -244,7 +244,7 @@ class CLI(object):
                 help="specify number of parallel processes to use (default=%s)" % C.DEFAULT_FORKS)
 
         if vault_opts:
-            parser.add_option('--ask-vault-pass', default=False, dest='ask_vault_pass', action='store_true',
+            parser.add_option('--ask-vault-pass', default=C.DEFAULT_ASK_VAULT_PASS, dest='ask_vault_pass', action='store_true',
                 help='ask for vault password')
             parser.add_option('--vault-password-file', default=C.DEFAULT_VAULT_PASSWORD_FILE, dest='vault_password_file',
                 help="vault password file", action="callback", callback=CLI.expand_tilde, type=str)