Upgrade to guava 16.0.1
Upgrade to guava 16.0.1

This fixes a swift bug that is caused by a guava incompatibility with newer builds of the JDK (bug is not present in 7u45, and is present in 7u51, appeared somewhere in between)

airlift/drift,alandau/swift,rojanu/swift,dain/swift,adriancole/swift,rojanu/swift,bgould/swift,karryoberes/swift,coderczp/swift,andrewcox/swift,electrum/swift,dain/swift,karryoberes/swift,electrum/swift,andrewcox/swift,dain/drift,facebook/swift,electrum/drift,glybuaa/swift,glybuaa/swift,bgould/swift,coderczp/swift,facebook/swift,adriancole/swift