Fix wrong argument count

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Initialize the varmap to make valgrind happy

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Add valgrind supression file for zeromq

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Try to use ctest memory checker

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>
Add a custom target to run valgrind memcheck

I was not able to get the suppressions into the ctest memcheck
integration - so there is now a "make test_memcheck" target.

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>