Adding requirements file check for python environment (#1067)
Adding requirements file check for python environment (#1067)

* Adding check for requirements file, in case user is simply using a source file and --src flag
* Adding bash check as per review comment

fission/fission,fission/fission,platform9/fission,platform9/fission,fission/fission,life1347/fission,fission/fission,life1347/fission,life1347/fission,platform9/fission,life1347/fission,life1347/fission,life1347/fission,life1347/fission,life1347/fission,platform9/fission,life1347/fission