chore: Update to kubernetes-client 2.4.1

That's the last one not triggering openshift/jenkins-sync-plugin#173 and syndesisio#747

Author: rhuss

pom.xml

@@ -95,7 +95,7 @@
     <infinispan.version>9.0.0.Final</infinispan.version>
     <jackson.version>2.8.10</jackson.version>
     <junit.version>4.12</junit.version>
-    <kubernetes.client.version>2.2.13</kubernetes.client.version>
+    <kubernetes.client.version>2.4.1</kubernetes.client.version>
     <mockwebserver.version>0.0.15</mockwebserver.version>
     <okhttp-eventsource.version>1.3.2</okhttp-eventsource.version>
     <postgresql.version>9.1-901-1.jdbc4</postgresql.version>