Revert "Adding multiple provider support in AbstractMasterSystem..."

Revert "Adding tests for multiple provider support in AbstractMa..."

Revert submission 17008428-cherrypick-multi-provider-cloudsearch-2yrjp5zxz1

Reason for revert: Broke TextToSpeech service
Reverted Changes:
If1d0ac733:Adding tests for multiple provider support in Abst...
I1da7f54bc:Adding multiple provider support in AbstractMaster...

Change-Id: Ic57ef1339b4b06b4b22981090a651eb4c570ca69
Bug: 222221754
9 files changed