CAS-1156: Reduced branching logic using commons API to use toInteger(bool,int,int). Also added logging to ehcache tests.

Additionally, I had to modify the test resources a bit for ehcache to allow for the surefire plugin's forkmode. Without this setting, two particular tests would always fail when attempting to delete tickets when running the test from cas-server root.

The two tests that fail without the forkMode setting are:

testDeleteExistingTicket(org.jasig.cas.ticket.registry.EhCacheTicketRegistryTests):
testDeleteNonExistingTicket(org.jasig.cas.ticket.registry.EhCacheTicketRegistryTests):