services.py isn't dynamic

[dmdhrumilmistry]

• services.py module contains hard coded and repeated values which decreases efficiency
• use json/yaml file which can contain all the information such as endpoint, headers, etc which can be read using json package then send request using a function to do repetitive task
  https://github.com/Nikait/ni_bomber/blob/master/services.py#L71-L77
• use aiohttp module to send requests at faster rate