LPS-44342 New method toEnumeration in SetUtil
LPS-44342 New CompositeResourceBundle

Returns the first non null key from the lists of bundles
LPS-44342 Added test for CompositeResourceBundle
LPS-44342 Extract logic to a new method using CompositeResourceBundle
LPS-44342 No need to pass locale along with resourceBundle nor pageContext or portletConfig
LPS-44342 SF
LPS-44342 Move logic to new ConfigurationPortlet
LPS-44342 Update ConfigurationPortlet to set proper request variables
LPS-44342 Fix StrutsResourceBundle
LPS-44342 SF
LPS-44342 Javadoc