e request URI that indicates the context of the request. The context path always comes first
 in a request URI. The path starts with a "/" character but does not end with a "/" character. For servlets in the
 default (root) context, this method returns "". The container does not decode this string.

 <p>
 It is possible that a servlet container may match a context by more than one context path. In such cases this method
 will return the actual context path used by the request and it may differ from the path