tests: fix a memory leak revealed by libsolv commit 0804020.
tests: fix a memory leak revealed by libsolv commit 0804020.

cgwalters/hawkey,rholy/hawkey,MichaelMraka/hawkey,rholy/hawkey,MichaelMraka/hawkey,Conan-Kudo/hawkey,mluscon/hawkey,mluscon/hawkey,yavor-atanasov/hawkey,megaumi/hawkey,mizdebsk/hawkey,ignatenkobrain/hawkey,mizdebsk/hawkey,mizdebsk/hawkey,cgwalters/hawkey,jsilhan/hawkey,MichaelMraka/hawkey,ignatenkobrain/hawkey,mluscon/hawkey,rholy/hawkey,jsilhan/hawkey,rholy/hawkey,rpm-software-management/hawkey,cgwalters/hawkey,megaumi/hawkey,yavor-atanasov/hawkey,yavor-atanasov/hawkey,mizdebsk/hawkey,ignatenkobrain/hawkey,jsilhan/hawkey,yavor-atanasov/hawkey,cgwalters/hawkey,megaumi/hawkey,rpm-software-management/hawkey,ignatenkobrain/hawkey,Conan-Kudo/hawkey,jsilhan/hawkey,Conan-Kudo/hawkey,megaumi/hawkey,rpm-software-management/hawkey,mluscon/hawkey,MichaelMraka/hawkey,rpm-software-management/hawkey,Conan-Kudo/hawkey