Rest: Add json in request body to scroll, clear scroll, and analyze API

 Move methods from Request to Action

Closes #5866
Rest: Add json in request body to scroll, clear scroll, and analyze API

 Add ClearScroll parse tests
 Fix build failure IndicesRequestTests

Closes #5866
Rest: Add json in request body to scroll, clear scroll, and analyze API

 Add SearchScroll parse tests

Closes #5866
Rest: Add json in request body to scroll, clear scroll, and analyze API

 Add Analyze parse tests
 Fix some issues

Closes #5866