The portlet can define additional runtime behavior in the portlet.xml on either the
portlet application level or the portlet level with the container-runtime-option element.
Runtime options that are defined on the application level should be applied to all portlets
in the portlet application. Runtime options that are defined on the portlet level should be
applied for this portlet only and override any runtime options defined on the application
level with the same name.
Container runtime options are optional to support by the portlet container and the portlet
can find out which container runtime options are supported by the portlet container
running the portlet via the method getContainerRuntimeOptions on the