Poisson web traffic generator, allowing on-the-fly traffic's load chaning
traffic_generator.py --filename Y --interval X --init Z --ip W --verbose B
Y = a file containing only the Poisson's Lambda parameter value (number)
X = an integer to set the interval between checking the Lambda's file changes
Z = initial Lambda's value
W = target ip address / web server
B = turn the log output on or off (1 or 0)