Upgrade to jclouds 1.9.0

Release notes:

http://jclouds.apache.org/releasenotes/1.9.0/

pom.xml

@@ -235,7 +235,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <jclouds.version>2.0.0-SNAPSHOT</jclouds.version>
+    <jclouds.version>1.9.0</jclouds.version>
   </properties>
 
   <prerequisites>