- getHRResponsible() returns result for local career step. Return value is an array of all found active VPTMs (should only be one but who knows). Inside the array there will be name, functional mail and private mail.
- in case no active VPTM is found an empty array null will be returned.

- TODO: implement the part for the national case
	verify that active VPTM is not an Alumni
- concerning the last commit: return was undefined if empty. Now it will be null!