[GEOS-5628] CatalogInfo objects will be cloned and rendered often useles...

...s when working against the GUI with multiple tabs open

[solved] Conflicts:

	src/main/src/test/java/org/geoserver/catalog/CatalogIntegrationTest.java
	src/main/src/test/java/org/geoserver/security/MigrateFrom_2_2_Test.java

This is a backport for:
https://jira.codehaus.org/browse/GEOS-5628