Add params for br_mgm

Close-bug: PROD-29044
Change-Id: I10432e72a504abf8eef0e0a42f915f088f131bd7
diff --git "a/\173\043 interfaces \043\175/single_mgm_dhcp" "b/\173\043 interfaces \043\175/single_mgm_dhcp"
index df607f5..8afc316 100644
--- "a/\173\043 interfaces \043\175/single_mgm_dhcp"
+++ "b/\173\043 interfaces \043\175/single_mgm_dhcp"
@@ -13,5 +13,7 @@
                 enabled: true
                 proto: dhcp
                 type: bridge
+                ipflush_onchange: true
+                restart_on_ipflush: true
                 use_interfaces:
                 - {{ interface_name }}
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