The plugin requires maven 3.1.1 or higher.
In version 1.1+ of the plugin the start goal was changed to the leave the server process running. If previously you relied on the maven process ending to shutdown the server you should now execute the shutdown goal before the maven process ends.
These options are redundant since the execute-commands goal could be run before and/or after a deployment goal.
The complex <executeCommands/> configuration parameter has been deprecated in favor of using the simple parameters. All configuration parameters can now to the parent configuration element.
To migrate from previous versions of the plugin simply remove the surrounding <executeCommands></executeCommands> element from your configuration leaving the children elements.