ARTEMIS-5603: update to curator 5.9.0

Author: gemmellr

pom.xml

@@ -121,7 +121,7 @@
       <jctools.version>4.0.5</jctools.version>
       <netty.version>4.1.123.Final</netty.version>
       <hdrhistogram.version>2.2.2</hdrhistogram.version>
-      <curator.version>5.8.0</curator.version>
+      <curator.version>5.9.0</curator.version>
       <zookeeper.version>3.9.3</zookeeper.version>
       <woodstox.version>4.4.1</woodstox.version>
       <pem-keystore.version>3.0.0</pem-keystore.version>