generate_key.py create new keytab secret.key file

[schnipdip]

Issue:

Create the secret.key file if it doesn't already exist.

Possible Resolution:

 with open('secret.key', 'wb+') as key_file:
     if os.stat(key_file).st_size == 0:
         key_file.write(key)
     else:
         print ('''Key already exits. If you want to generate a new key delete the key in the secrets.key file.''')
         exit(0)