Re: [libvirt] [PATCH v2] tests: Partly fix networkxml2argvtest being configure result dependent

Convert networkDnsmasqLeaseFileName to a replaceable function pointer that allow the testsuite to use a version of that function that is not depending on configure --localstatedir. This fixes 5 of 6 test failures, when configure --localstatedir isn't set to /var. --- The last failure is related to networkBuildDhcpDaemonCommandLine trying to indirectly write dnsmasq config files to disk. This needs a larger rewrite to separate the config file writing out of networkBuildDhcpDaemonCommandLine.