Updated bookkeper version to 4.3.1.72 (#757)

BK changes:
 * Issue #372: Allow to configure advertised address in bookies
 * Fix DoubleByteBuf readableBytes()

pom.xml

@@ -103,7 +103,7 @@ flexible messaging model and an intuitive client API.</description>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-    <bookkeeper.version>4.3.1.69-yahoo</bookkeeper.version>
+    <bookkeeper.version>4.3.1.72-yahoo</bookkeeper.version>
     <zookeeper.version>3.4.10</zookeeper.version>
     <netty.version>4.0.46.Final</netty.version>
     <storm.version>0.9.5</storm.version>