add more py3 scripts for xen 8.4

Author: Pearl1594

scripts/vm/hypervisor/xenserver/xenserver84/patch

@@ -28,7 +28,7 @@
 # If [source path] does not start with '/' or '~', then it is relative path to the location of the patch file.
 vmops=,0755,/etc/xapi.d/plugins
 vmopspremium=..,0755,/etc/xapi.d/plugins
-vmopsSnapshot=..,0755,/etc/xapi.d/plugins
+vmopsSnapshot=,0755,/etc/xapi.d/plugins
 xen-ovs-vif-flows.rules=..,0644,/etc/udev/rules.d
 ovs-vif-flows.py=,0755,/etc/xapi.d/plugins
 cloudstack_plugins.conf=..,0644,/etc/xensource