Extend election handler run window and clean up error messages

Under stress, the election handler in feature-active-standby-management may not get a chance to run within the allowed window causing the "watcher" thread to kill it and restart it.  The window needs to be expanded.  Also expand the pdp.updateInterval and pdp.checkInterval parameter values appropriately in the properties file.

The /test REST interface generates an (erroneous) error message every time it is called.  This must be changed to a debug message.

Under some conditions the JPA transaction may be already closed when commit is called in StateManagement. Surround it with a check to see if the transaction is active, so it will not generate an error in the log.