[apache#1779] fix(IT): Fix container network configuration error (apa…

…che#2465)

### What changes were proposed in this pull request?

1. Enhancing code robustness.
2. Fix container network configuration error 

### Why are the changes needed?

There are some versions of docker where this issue occurs

Fix: apache#1779

### Does this PR introduce _any_ user-facing change?

N/A

### How was this patch tested?

CI Passed

integration-test/src/test/java/com/datastrato/gravitino/integration/test/container/ContainerSuite.java

@@ -29,7 +29,7 @@ public class ContainerSuite implements Closeable {
   // The subnet must match the configuration in `dev/docker/tools/mac-docker-connector.conf`
   public static final String CONTAINER_NETWORK_SUBNET = "10.20.30.0/28";
   private static final String CONTAINER_NETWORK_GATEWAY = "10.20.30.1";
-  private static final String CONTAINER_NETWORK_IPRANGE = "10.20.30.14/28";
+  private static final String CONTAINER_NETWORK_IPRANGE = "10.20.30.0/28";
   private static final String NETWORK_NAME = "gravitino-ci-network";
 
   private static Network network = null;
@@ -160,6 +160,9 @@ private static Network createDockerNetwork() {
 
     for (com.github.dockerjava.api.model.Network network : networks) {
       List<Config> ipamConfigs = network.getIpam().getConfig();
+      if (ipamConfigs == null) {
+        continue;
+      }
       for (Config ipamConfig : ipamConfigs) {
         try {
           if (ipRangesOverlap(ipamConfig.getSubnet(), CONTAINER_NETWORK_SUBNET)) {