Add a new test to check for duplicate IPs in an env

Change-Id: I08ad6b22f252a0f8ea5bc4a4edd2fe566826868b
Closes-PROD: #PROD-24347
diff --git a/test_set/cvp-sanity/global_config.yaml b/test_set/cvp-sanity/global_config.yaml
index 4faddaa..b1af7a4 100644
--- a/test_set/cvp-sanity/global_config.yaml
+++ b/test_set/cvp-sanity/global_config.yaml
@@ -65,6 +65,12 @@
     "skipped_ifaces": ["bonding_masters", "lo", "veth", "tap", "cali", "qv", "qb", "br-int", "vxlan"]}
 # mask for interfaces to skip
 
+# test duplicate ips
+# do not comment this section
+test_duplicate_ips:
+  {
+    "skipped_ifaces": ["lo", "virbr0", "docker_gwbridge", "docker0"]}
+
 # specify what mcp version (tag) is deployed
 drivetrain_version: ''