tests: qemu: Add QMP schema checking in qemuMonitorTestProcessCommandVerbatim
tests: qemu: Add QMP schema checking in qemuMonitorTestProcessCommandVerbatim

In case when we are testing a QMP command we can try to schema check it
so that we catch inconsistencies.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

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