Chaning version in the POM that is shipped out (#356)

Author: yvgopal

azure-servicebus/azure-servicebus.pom

@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.microsoft.azure</groupId>
     <artifactId>azure-servicebus</artifactId>
-    <version>1.2.11</version>
+    <version>1.2.13</version>
     <licenses>
         <license>
             <name>The MIT License (MIT)</name>