tests: qemuxml2argvmock: Allow 'safe' file descriptors in mocked virCommandPassFD
tests: qemuxml2argvmock: Allow 'safe' file descriptors in mocked virCommandPassFD

Allow FDs which are marked as safe for FD passing.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>

libvirt/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,zippy2/libvirt,jfehlig/libvirt,crobinso/libvirt,eskultety/libvirt,jardasgit/libvirt,olafhering/libvirt,eskultety/libvirt,zippy2/libvirt,eskultety/libvirt,crobinso/libvirt,jfehlig/libvirt,nertpinx/libvirt,jfehlig/libvirt,nertpinx/libvirt,libvirt/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,zippy2/libvirt,fabianfreyer/libvirt,eskultety/libvirt,olafhering/libvirt,olafhering/libvirt,olafhering/libvirt,eskultety/libvirt,jardasgit/libvirt,andreabolognani/libvirt,nertpinx/libvirt,zippy2/libvirt,crobinso/libvirt,andreabolognani/libvirt,jardasgit/libvirt,andreabolognani/libvirt,crobinso/libvirt,jfehlig/libvirt,libvirt/libvirt,fabianfreyer/libvirt,jardasgit/libvirt