[server][testDBClientHatohol] Add AssertGetTriggersArg based on event's one
[server][test] Use reference instead of pointer for the argument of makeExpectedOutput()
[server][testDBClientHatohol] Add targetServerId and targetHostId to AssertGetTriggersArg
[server][testDBClientHatohol] Move up assertGetEventsWithFilter()
[server][testDBClientHatohol] Replace assertGetTriggers() using AssertGetTriggersArg
[server][testDBClientHatoho] Test getting triggers with access control