Merge to develop. Support node config in tabsearch, search and html5ui widget apps. Add node parameter to j_spring_security_check.

Widgets apps are available at:
* http://localhost:8080/geonetwork/node1/eng/search
* http://localhost:8080/geonetwork/node1/eng/find = apps/search
* http://localhost:8080/geonetwork/node1/eng/tabsearch = apps/tabsearch