libvirt security update

[5.7.0-21.el7]

• exadata: Fix the validation when defining domain groups (Wim ten Have) [Orabug: 32085856]
• Revert ‘qemu: dont take agent and monitor job for shutdown’ (Menno Lageman) [Orabug: 32080283]
• Revert ‘qemu: dont hold a monitor and agent job for reboot’ (Menno Lageman) [Orabug: 32080283]
• Revert ‘qemu: dont hold monitor and agent job when setting time’ (Menno Lageman) [Orabug: 32080283]
• Revert ‘qemu: remove use of qemuDomainObjBeginJobWithAgent()’ (Menno Lageman) [Orabug: 32080283]
• qemu: improve error message when guest vcpu count exceeds domain group limit (Menno Lageman) [Orabug: 31985111]
• qemu: Autonomous hugepage acquisition for 2-MiB and 1-GiB guest memoryBacking. (Wim ten Have)
• qemu: Fix a qemuMemReleaseHostHugepages state error (Wim ten Have) [Orabug: 32069203]
• qemu: avoid guest CPU process handling if exadataConfig is disabled (Wim ten Have) [Orabug: 32053696]
• domain_conf: Relax SCSI addr used check (Michal Privoznik) [Orabug: 31386162]
• domain_conf: Make virDomainDeviceFindSCSIController accept virDomainDeviceDriveAddress struct (Michal Privoznik) [Orabug: 31386162]
  [5.7.0-20.el7]
• qemu: remove use of qemuDomainObjBeginJobWithAgent() (Jonathon Jongsma) [Orabug: 31990187] {CVE-2019-20485}
• qemu: dont hold monitor and agent job when setting time (Jonathon Jongsma) [Orabug: 31990187] {CVE-2019-20485}
• qemu: dont hold a monitor and agent job for reboot (Jonathon Jongsma) [Orabug: 31990187] {CVE-2019-20485}
• qemu: dont take agent and monitor job for shutdown (Jonathon Jongsma) [Orabug: 31990187] {CVE-2019-20485}
• qemu: agent: set ifname to NULL after freeing (Jan Tomko) [Orabug: 31964426] {CVE-2020-25637}
• rpc: require write acl for guest agent in virDomainInterfaceAddresses (Jan Tomko) [Orabug: 31964426] {CVE-2020-25637}
• rpc: add support for filtering @acls by uint params (Jan Tomko) [Orabug: 31964426] {CVE-2020-25637}
• rpc: gendispatch: handle empty flags (Jan Tomko) [Orabug: 31964426] {CVE-2020-25637}
• qemu: blockcopy: Fix conditions when virStorageSource should be initialized (Peter Krempa) [Orabug: 31517934]
• qemu: blockcopy: Report error on image format detection failure (Peter Krempa) [Orabug: 31517934]