qemuDomainSendKey: Relax the qemu driver locking
qemuDomainSendKey: Relax the qemu driver locking

Currently, there is no reason to hold qemu driver locked
throughout whole API execution. Moreover, we can use the
new qemuDomObjFromDomain() internal API to lookup domain then.

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