JCLOUDS-317: Fix NPE when ComputeService.listNodes()

Follow-up to 222779b
JCLOUDS-528: Ability to control interfaces to test for SocketFinder
JCLOUDS-534: Address Guava 17 compatibility issues

Corrected with:

find -name \*.java | xargs sed -i 's/new Stopwatch();/Stopwatch.createUnstarted();/'
find -name \*.java | xargs sed -i 's/new Stopwatch().start();/Stopwatch.createStarted();/'
Address several Guava InputSupplier deprecations

Many remain due to Payload implementing InputSupplier<InputStream>.  Guava 18
will remove InputSupplier.
Updated links to the user and dev mailing lists
JCLOUDS-534: Upgrade to Guava 17.0-rc2

This commit accommodates changes to Predicates.and.toString and
PublicSuffixPatterns.EXACT.  Release notes:

https://code.google.com/p/guava-libraries/wiki/Release17
Mark Swift blobstores as eventually consistent

This allows tests to retry correctly.  Most blobstores, including
Swift[1], offer eventual consistency, although Azure[2] and the
jclouds test blobstores offer strong consistency.

[1] https://lists.launchpad.net/openstack/msg06788.html
[2] http://blogs.msdn.com/b/windowsazure/archive/2011/11/21/windows-azure-storage-a-highly-available-cloud-storage-service-with-strong-consistency.aspx
JCLOUDS-526: Removing Nova QuotaClassApi

The quota-classes API in Nova has been removed (and apparently never worked)
Creating a separate function to delete directories

Small refactoring to reuse some code.
Updating the Maven Site plugin version 3.1 -> 3.3

Also removing the stagingSiteURL parameter as we should not need
it for the site:deploy goal
ServerPredicates to make waiting easier.
Updated service types for OpenStack/Rackspace services
JCLOUDS-534: Upgrade to Guava 17.0

Release notes:

https://code.google.com/p/guava-libraries/wiki/Release17
JCLOUDS-505: Remove unused ObjectMD5

The only users of this seem to be
org.jclouds.atmos.blobstore.strategy.FindMD5InUserMetadata and
org.jclouds.azureblob.blobstore.strategy.FindMD5InBlobProperties which
are themselves unused.
Address Checkstyle violations
JCLOUDS-561: Properly populate the ssh agent connection in the builder methods
Enforce that all commas have trailing whitespace
Enable whitespace around Checkstyle rule
Updated ServiceType refs in Cloud Databases
Remove deprecation from getConsistencyModel

This method informs callers of the expected blobstore behavior,
avoiding unnecessary work for providers which support strict
consistency (Azure, mock blobstores).