PutForExternalRead doesn't supress exceptions with TotalOrder

putForExternalRead is supposed to suppress any exceptions, but that doesn't work with Total Order caches.

Normally exceptions are suppressed in InvocationInterceptor.handleAll because the PFER PutKeyValueCommand has the FAIL_SILENTLY flag, but with TO the PFER is executed transactionally and the flag is not passed to the PrepareCommand.