[Octavia] Make lb-mgmt-net parametrized

Related-PROD: PROD-24663
Change-Id: I96c0b5d7852f0fa1eb8378a07357e51bc893b419
diff --git a/neutron/client/service/octavia.yml b/neutron/client/service/octavia.yml
index 90a4a4e..f9cc934 100644
--- a/neutron/client/service/octavia.yml
+++ b/neutron/client/service/octavia.yml
@@ -1,8 +1,6 @@
 classes:
 - service.neutron.client
 parameters:
-  _param:
-    octavia_hm_bind_ip: '192.168.0.12'
   neutron:
     client:
       server:
@@ -14,10 +12,10 @@
               admin_state_up: True
               subnet:
                 lb-mgmt-subnet:
-                  cidr: 192.168.0.0/24
+                  cidr: ${_param:octavia_lb_mgmt_cidr}
                   allocation_pools:
-                    - start: 192.168.0.2
-                      end: 192.168.0.200
+                    - start: ${_param:octavia_lb_mgmt_allocation_pool_start}
+                      end: ${_param:octavia_lb_mgmt_allocation_pool_end}
               port:
                 octavia-health-manager-listen-port:
                   fixed_ips: