* This project is created from eclipse, so you need to install aws eclipse plugins first
* check **SubnetCalculator** class in this class you will find *handleRequest(LinkedHashMap<String,Object> input, Context context)* method, that is all it takes
* LambdaCFNRequest:-Equivalent to AWS CloudFormation Request JSON template.It just makes easy for me to work with properties of the request.
* LambdaCFNResponse:-Equivalent to AWS CloudFormation Response JSON template.It just makes easy for me to populate the response through out the process.
AWS DynamoDB is used here to store **SubnetIDs** or **Network Adresses** that are occupied.