Fix VPC restart with multi-CIDR networks: handle comma-separated CIDR in NetworkVO.equals()

When a network has multiple CIDRs (e.g. '192.168.2.0/24,160.0.0.0/24'),
NetworkVO.equals() passes the raw comma-separated string to
NetUtils.isNetworkAWithinNetworkB() which expects a single CIDR,
causing 'cidr is not formatted correctly' error during VPC restart
with cleanup=true.

Extract only the first CIDR value before passing to NetUtils.

Author: jean

engine/schema/src/main/java/com/cloud/network/dao/NetworkVO.java

@@ -600,7 +600,9 @@ public boolean equals(Object obj) {
             return true;
         }
 
-        return NetUtils.isNetworkAWithinNetworkB(cidr, that.cidr);
+        return NetUtils.isNetworkAWithinNetworkB(
+                com.cloud.utils.StringUtils.getFirstValueFromCommaSeparatedString(cidr),
+                com.cloud.utils.StringUtils.getFirstValueFromCommaSeparatedString(that.cidr));
     }
 
     @Override