qa/1222: check if valgrind is installed before trying to use it
qa/1222: check if valgrind is installed before trying to use it

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp