Make sure the accelerated port is set to a sane value

lib/ansible/runner/connection_plugins/accelerate.py

@@ -58,6 +58,9 @@ class Connection(object):
             private_key_file=private_key_file
         )
 
+        if not self.accport:
+            self.accport = constants.ACCELERATE_PORT
+
         # attempt to work around shared-memory funness
         if getattr(self.runner, 'aes_keys', None):
             utils.AES_KEYS = self.runner.aes_keys