Fixed missing display, window, and context id not being set

Change-Id: Ieeef5449b801b56deff30dc23827a88177e0aac4
Using the external renderwindow always uses current context

Remove the DrawWindow flag. This makes the external render window
to use the current OpenGL context only. It never tries to draw
its own window.

Change-Id: I14d048ebcbfe345b2e7002c84c9934127298754d
Merge branch 'aashish24-fix_context_info_not_set' into Rendering_External_Module

Change-Id: Ic8c4dffa0f9e6bc95c40a5d1810411bb68080631