Upgrade Guava version to 16.0.1

Change-Id: Ic755cc491e86152306c85a8c793325b2e4af12f3
diff --git a/pom.xml b/pom.xml
index 786ecb9..aa65dec 100644
--- a/pom.xml
+++ b/pom.xml
@@ -546,7 +546,7 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>14.0.1</version>
+      <version>16.0.1</version>
     </dependency>
     <dependency>
       <groupId>commons-httpclient</groupId>