virnettlscontexttest: Resolve memory leak found by Valgrind
virnettlscontexttest: Resolve memory leak found by Valgrind

testTLSDerEncode() will allocate memory for der.data, it wasn't VIR_FREE()'d.
also don't initialized der to use static buffer.

olafhering/libvirt,jardasgit/libvirt,jardasgit/libvirt,libvirt/libvirt,siboulet/libvirt-openvz,jardasgit/libvirt,andreabolognani/libvirt,agx/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,rlaager/libvirt,taget/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,trainstack/libvirt,iam-TJ/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,cbosdo/libvirt,rlaager/libvirt,rlaager/libvirt,rlaager/libvirt,zippy2/libvirt,eskultety/libvirt,trainstack/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,siboulet/libvirt-openvz,taget/libvirt,trainstack/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,shugaoye/libvirt,datto/libvirt,elmarco/libvirt,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,crobinso/libvirt,taget/libvirt,eskultety/libvirt,jfehlig/libvirt,nertpinx/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,siboulet/libvirt-openvz,eskultety/libvirt,siboulet/libvirt-openvz,zhlcindy/libvirt-1.1.4-maintain,datto/libvirt,shugaoye/libvirt,datto/libvirt,crobinso/libvirt,olafhering/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,eskultety/libvirt,cbosdo/libvirt,agx/libvirt,iam-TJ/libvirt,andreabolognani/libvirt,jardasgit/libvirt,shugaoye/libvirt,olafhering/libvirt,cbosdo/libvirt,shugaoye/libvirt,iam-TJ/libvirt,taget/libvirt,cbosdo/libvirt,iam-TJ/libvirt,cbosdo/libvirt,elmarco/libvirt,iam-TJ/libvirt,fabianfreyer/libvirt,agx/libvirt,VenkatDatta/libvirt,elmarco/libvirt,nertpinx/libvirt,datto/libvirt,agx/libvirt,rlaager/libvirt,crobinso/libvirt,trainstack/libvirt,nertpinx/libvirt,elmarco/libvirt,libvirt/libvirt,olafhering/libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,taget/libvirt,datto/libvirt,zippy2/libvirt,libvirt/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,trainstack/libvirt,agx/libvirt,andreabolognani/libvirt,elmarco/libvirt,VenkatDatta/libvirt,trainstack/libvirt,zippy2/libvirt,jfehlig/libvirt,jfehlig/libvirt,nertpinx/libvirt