python3.7 does not exist on CentOS 8 devserver
python3.7 does not exist on CentOS 8 devserver

Summary: Instead, switch to python3.

Reviewed By: zertosh

shipit-source-id: abf72bae59892680daef2a62936b7d0f19c11b9a

JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck