Revert "Fixed strings for distributed status page. Removed setHeader() call that causes problems in Spring 3.1."

This reverts commit a2f09e3bbb619142a2ab587ee2e94ebf30033b0d.
Revert "Re-upgraded Spring to version 3.1.4."

This reverts commit f1c59dd483c782b1aa3145cade7fe3b306491c94.
Revert "Added missing Hibernate validator dependency."

This reverts commit 5f7783bd5306d0122546dcb37cf00af2aa27e133.