upgrade to CDH 5.12.0

Author: sebastian-nagel

pom-cdh5.xml

@@ -99,7 +99,7 @@
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-client</artifactId>
-      <version>2.6.0-cdh5.11.1</version>
+      <version>2.6.0-cdh5.12.0</version>
       <exclusions>
         <exclusion>
           <groupId>commons-httpclient</groupId>