D-Net

Update Test3Service temporary, GET authenticate and POST authenticates

Update JWTGenerator, add jwt expiration time 1800000

Update JWTGenerator, add jwt expiration date 30 minutes

Update JWTGenerator, add all the credentials for a user

Added first JWT Generation implementation

Using spring created beans in Test3Service.

Springfization of project

finalizing spring-ing

springfy project

Delete JDBCConnector