LRDOCS776, added instructions on enabling PACL for Liferay running on
Tomcat 7, as per LRDOCS 703. Liferay starts successfully, but there are
multiple errors in the log similar to this:
ERROR [localhost-startStop-1][HotDeployImpl:92] com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for marketplace-portletmarketplace-portlet
com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering plugins for marketplace-portletmarketplace-portlet