- display json reponse properly

...n/freeswitch/voice/FreeswitchConferenceEventListener.java

...gbluebutton/freeswitch/voice/IVoiceConferenceService.java

...ton/freeswitch/voice/events/FreeswitchHeartbeatEvent.java

...n/freeswitch/voice/events/FreeswitchStatusReplyEvent.java

...ebutton/freeswitch/voice/freeswitch/ESLEventListener.java

...oice/freeswitch/actions/CheckFreeswitchStatusCommand.java

...b-fsesl/src/main/scala/org/bigbluebutton/ApiService.scala

...org/bigbluebutton/freeswitch/VoiceConferenceService.scala

...main/scala/org/bigbluebutton/service/HealthzService.scala