bugfix: wrong hook directory path

templates/kea-dhcp-ha.j2

@@ -29,11 +29,11 @@
 {%    if (ha_servers | length) > 1 %}
     "hooks-libraries": [
        {
-          "library": "{{ system_app_root }}/lib/hooks/libdhcp_lease_cmds.so",
+          "library": "{{ system_app_root }}/lib/kea/hooks/libdhcp_lease_cmds.so",
           "parameters": { }
        },
        {
-          "library": "{{ system_app_root }}/lib/hooks/libdhcp_ha.so",
+          "library": "{{ system_app_root }}/lib/kea/hooks/libdhcp_ha.so",
           "parameters": {
               "high-availability": [ {
                  "this-server-name": "{{ inventory_hostname }}",