Update RC1 to have joint installation of PT and PTL
@DEKHTIARJonathan The code here is installed via reinstall.sh - which does pip install .[all]. 

It's still following all wheel semantics. The issue is that the pytorch container 21.02 is masquerading as a Pytorch 1.8.0a* - but it is in fact NOT pytorch 1.8. 

This confuses Pytorch Lightning which has code switching for deprecated torchtext functionality. 

The pip release is explicitly handled by @okuchaiev - he can remove this patch. But for the moment, none of the RC1 branch code will run or can be tested on pytorch 1.8 since 21.03 container has not been released yet.  I still oppose this PR. Code relevant to your testing environment should not pollute the core of the package. This approach is just bad practices.
Signed-off-by: smajumdar <titu1994@gmail.com>