Use cxf subresources for page /region /regionwidgets

git-svn-id: http://svn.apache.org/repos/asf/rave/trunk@1509242 13f79535-47bb-0310-9956-ffa450edef68
RAVE-1019: Add getManagedHub back to rave core. Applying Dan Gornstein's patch.

git-svn-id: http://svn.apache.org/repos/asf/rave/trunk@1509253 13f79535-47bb-0310-9956-ffa450edef68
Update page, region, regionwidget resources to delegate to subresources for get methods

git-svn-id: http://svn.apache.org/repos/asf/rave/trunk@1509350 13f79535-47bb-0310-9956-ffa450edef68