Merge branch 'master' into async-await-test

.travis.yml

akka-bbb-apps/build.sbt

akka-bbb-apps/project/Build.scala

akka-bbb-apps/project/Dependencies.scala

akka-bbb-apps/project/build.properties

akka-bbb-apps/project/plugins.sbt

akka-bbb-apps/run.sh

akka-bbb-apps/src/main/resources/application.conf

akka-bbb-apps/src/main/scala/org/bigbluebutton/Boot.scala

...rc/main/scala/org/bigbluebutton/SystemConfiguration.scala

...src/main/scala/org/bigbluebutton/core/MessageSender.scala

...igbluebutton/core/apps/users/RegisterUserReqMsgHdlr.scala

...ton/core/pubsub/senders/ReceivedJsonMsgHandlerActor.scala

...la/org/bigbluebutton/core/record/events/RecordEvent.scala

.../org/bigbluebutton/core2/FromAkkaAppsMsgSenderActor.scala

...ebutton/endpoint/redis/AkkaAppsRedisSubscriberActor.scala

...gbluebutton/endpoint/redis/AppsRedisSubscriberActor.scala

...igbluebutton/endpoint/redis/KeepAliveRedisPublisher.scala

...ala/org/bigbluebutton/endpoint/redis/RedisPublisher.scala

...org/bigbluebutton/endpoint/redis/RedisRecorderActor.scala