centos: Mask libvirtd sockets which prevents cloudstack-agent from being setup (#4756)

* Prevent adding --listen parameter when libvirt version > 5.6

* mask libvirtd sockets

* remove unused import

Co-authored-by: Pearl Dsilva <pearl.dsilva@shapeblue.com>

Author: Pearl1594

python/lib/cloudutils/serviceConfig.py

@@ -535,6 +535,12 @@ def config(self):
                 cfo.addEntry("export CGROUP_DAEMON", "'cpu:/virt'")
             cfo.addEntry("LIBVIRTD_ARGS", "-l")
             cfo.save()
+            if os.path.exists("/lib/systemd/system/libvirtd.socket"):
+                bash("/bin/systemctl mask libvirtd.socket");
+                bash("/bin/systemctl mask libvirtd-ro.socket");
+                bash("/bin/systemctl mask libvirtd-admin.socket");
+                bash("/bin/systemctl mask libvirtd-tls.socket");
+                bash("/bin/systemctl mask libvirtd-tcp.socket");
 
             filename = "/etc/libvirt/qemu.conf"