LRP-614 Web TestEngine demo

Create an Ext plugin to create a backup of the original JSP and extend the backup JSP

Create a hook plugin to override the original JSP using the <liferay-util:buffer> tag to copy the contents
of the JSP

Create a hook plugin to override the original JSP using the <file-name>-override.jsp pattern

Create an Ext plugin to override the original JSP using the <liferay-util:include> tag to copy the
contents of the JSP