Remove dependencies on spring-boot-starter-tomcat and json-path

spring-boot-starter-tomcat was never being used in the first place. It was there due to assumption that it might be needed.

json-path is no longer needed since the implementation for UserControllerTest has changed.

Fixes #15
Remove templates directory

The directory was there to satisfy the need of IndexController which will direct to index.html. However now it has been turned into a rest service the folder is unnecessary.

Fixed #15