Add check for existing ocw virtualenv
Add check for existing ocw virtualenv

pwcberry/climate,Omkar20895/climate,MBoustani/climate,Omkar20895/climate,riverma/climate,huikyole/climate,apache/climate,apache/climate,agoodm/climate,agoodm/climate,jarifibrahim/climate,riverma/climate,Omkar20895/climate,lewismc/climate,jarifibrahim/climate,Omkar20895/climate,riverma/climate,pwcberry/climate,lewismc/climate,apache/climate,MBoustani/climate,riverma/climate,MJJoyce/climate,kwhitehall/climate,lewismc/climate,pwcberry/climate,apache/climate,MJJoyce/climate,lewismc/climate,agoodm/climate,MBoustani/climate,pwcberry/climate,jarifibrahim/climate,huikyole/climate,kwhitehall/climate,MJJoyce/climate,apache/climate,huikyole/climate,jarifibrahim/climate,agoodm/climate,Omkar20895/climate,kwhitehall/climate,huikyole/climate,pwcberry/climate,MBoustani/climate,huikyole/climate,MBoustani/climate,jarifibrahim/climate,MJJoyce/climate,riverma/climate,MJJoyce/climate,lewismc/climate,agoodm/climate,kwhitehall/climate