Merged in NRRPLT-5618-add-virtualcoach-calls-for-t (pull request #14)

NRRPLT-5618 add virtualcoach calls for the recorder

* [NRRPLT-5618] Recorders call for the VirtualCoach

* [NRRPLT-5618] Fix some problem during saving and add a new recording sample

* [NRRPLT-5618] Some testing set experiment file function to debug

* [NRRPLT-5618] debugging instructions now working

* [NRRPLT-5618] A working version of the save recording description

* [NRRPLT-5618] Some pep8 fixes

* [NRRPLT-5618] Added tests

* [NRRPLT-5618] Added some config validation for recorder

* [NRRPLT-5618] Fix some tests

Approved-by: Manos Angelidis <angelidis@fortiss.org>