JCLOUDS-427: Upgrading Guava 16.0 -> 16.0.1

Fixes Guava issue 1635.
JCLOUDS-432: Revert "JCLOUDS-427: Avoiding Guava reflection code broken in Java 7u51"

This reverts commit 8ff60020f85ae5d9f57e9a25a6342fb7b00e1d2a.