OnLanguageChange and OnSystemInfoChanged are sent twice

[GetmanetsIrina]

Bug Report

OnLanguageChange and OnSystemInfoChanged are sent twice

Reproduction Steps

1. SDL and HMI are started
2. App is registered
3. Change language on HMI

Expected Behavior

HMI sends OnLanguageChange and OnSystemInfoChanged once to SDL

Observed Behavior

FFW.UI.OnLanguageChange
RPCClient.js:317 HMI -> SDL [15:17:6:13]: {"jsonrpc":"2.0","method":"UI.OnLanguageChange","params":{"language":"DE-DE"}}
BasicCommunicationRPC.js:1036 FFW.BasicCommunication.OnSystemInfoChanged
RPCClient.js:317 HMI -> SDL [15:17:6:17]: {"jsonrpc":"2.0","method":"BasicCommunication.OnSystemInfoChanged","params":{"language":"DE-DE"}}
UIRPC.js:1589 FFW.UI.OnLanguageChange
RPCClient.js:317 HMI -> SDL [15:17:6:20]: {"jsonrpc":"2.0","method":"UI.OnLanguageChange","params":{"language":"DE-DE"}}
BasicCommunicationRPC.js:1036 FFW.BasicCommunication.OnSystemInfoChanged
RPCClient.js:317 HMI -> SDL [15:17:6:22]: {"jsonrpc":"2.0","method":"BasicCommunication.OnSystemInfoChanged","params":{"language":"DE-DE"}}
RPCClient.js:137 SDL -> HMI [15:17:6:126]: {"id":262,"jsonrpc":"2.0","method":"BasicCommunication.UpdateAppList","params":{"applications":[]}}

OS & Version Information

• SDL: https://github.com/smartdevicelink/sdl_core/tree/release/6.0.0 (tag RC_2)
  https://github.com/smartdevicelink/sdl_core/tree/develop
• HMI: https://github.com/smartdevicelink/sdl_hmi/tree/develop
  (bd53f11)
• SPT: https://rink.hockeyapp.net/apps/dbc7db5274027027262185753824e34d
  Version 20191028-Nightly-Android (1034)

[YarikMamykin]

@theresalech Please triage this issue and notice linked fix is ready for review.

[jacobkeeler]

Closing with the merge of #263