get user supplied info.py

# Get the URL from environmentals. Example: "10.241.209.162:8443"
try:
    location = os.environ['SRUNILOCATION']
except KeyError:
    logger.critical('Need an IP:Port. Please set the environment variable SRUNILOCATION to IP:Port of Unisphere '
                    'using either "export SRUNILOCATION=IP:PORT" (linux command) or "set SRUINLOCATION=IP:PORT" '
                    '(Windows command)')
    sys.exit(1)

# Get credentials for Unisphere login from environmentals
try:
    user = os.environ['SRUSER']
except KeyError:
    logger.critical('Need a username. Please set the environment variable SRUSER to the username of Unisphere using'
                    'either "export SRUSER=username" (linux command) or "set SRUSER=username" (Windows command)')
    sys.exit(1)

try:
    password = os.environ['SRPASS']
except KeyError:
    logger.critical('Need a password. Please set the environment variable SRPASS to the password of Unisphere using '
                    'either "export SRUSER=password" (linux command) or "set SRUSER=password" (Windows command)')
    sys.exit(1)