qemu: Acquire domain job in qemuDomainGetFSInfo and qemuDomainGetGuestInfo
qemu: Acquire domain job in qemuDomainGetFSInfo and qemuDomainGetGuestInfo

These two functions work with vm->def in their critical sections
(i.e. after the job was acquired and before it is released). But
that means, they need QUERY domain job too to prevent vm->def
change.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

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