akka-apps: extend SysConf in VoiceApp

To be used with the ejectRogueVoiceUsers config option

akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceApp.scala

 package org.bigbluebutton.core.apps.voice
 
+import org.bigbluebutton.SystemConfiguration
 import org.bigbluebutton.LockSettingsUtil
 import org.bigbluebutton.common2.msgs.{ BbbClientMsgHeader, BbbCommonEnvCoreMsg, BbbCoreEnvelope, ConfVoiceUser, MessageTypes, Routing, UserJoinedVoiceConfToClientEvtMsg, UserJoinedVoiceConfToClientEvtMsgBody, UserLeftVoiceConfToClientEvtMsg, UserLeftVoiceConfToClientEvtMsgBody, UserMutedVoiceEvtMsg, UserMutedVoiceEvtMsgBody }
 import org.bigbluebutton.core.apps.breakout.BreakoutHdlrHelpers
@@ -9,7 +10,7 @@ import org.bigbluebutton.core.running.{ LiveMeeting, OutMsgRouter }
 import org.bigbluebutton.core2.MeetingStatus2x
 import org.bigbluebutton.core2.message.senders.MsgBuilder
 
-object VoiceApp {
+object VoiceApp extends SystemConfiguration {
 
   def genRecordPath(
       recordDir:       String,