Update Hazelcast 3.2.3 -> 3.2.4

- Contains backport of critical bug
   https://github.com/hazelcast/hazelcast/issues/2674
  Source diff:
   https://github.com/hazelcast/hazelcast/compare/v3.2.3...v3.2.4

Change-Id: I61d1957d1eb1aa8d79d9161546abc5fd948c461a
diff --git a/pom.xml b/pom.xml
index 019a5ad..09d45b4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
      see https://github.com/OPENNETWORKINGLAB/ONOS/pull/425
     <github.global.server>github</github.global.server>
      -->
-    <hazelcast.version>3.2.3</hazelcast.version>
+    <hazelcast.version>3.2.4</hazelcast.version>
     <metrics.version>3.0.2</metrics.version>
     <maven.surefire.plugin.version>2.16</maven.surefire.plugin.version>
   </properties>