Catch implicit exception

CacheBuilder.expireAfterWrite() has possibility to raise exception if
expiration is negative. So cache object cannot be set to final member in
ReplicationCache. Also its exception is not catched anywhere.

This patch moves cache creation and logging to new method.
And adds factory class for initializing ReplicationCache correctly.

Fix for JENKINS-22814: Some infomations are logged from constructor on
startup 
https://issues.jenkins-ci.org/browse/JENKINS-22814
Improve to treat arguments and logging
Change form value check to non-negative integer
Merge pull request #150 from rinrinne/replication-cache

Catch implicit exception