Change 'actions' to 'gestures' in single action

Author: imurchie

appium/webdriver/common/touch_action.py

@@ -90,7 +90,7 @@ def release(self):
  def perform(self):
  """Perform the action by sending the commands to the server to be operated upon
  """
- params = {'actions': self._actions}
+ params = {'gestures': self._actions}
  self._driver.execute(Command.TOUCH_ACTION, params)
 
  # get rid of actions so the object can be reused
@@ -122,7 +122,7 @@ def _get_opts(self, element, x, y, duration = None):
  x, y = None, None
  opts['x'] = x
  opts['y'] = y
- 
+
  if duration is not None:
  opts['duration'] = duration