Remove AsyncBlobStore from DeleteAllKeysInList

We deprecated AsyncBlobStore in 1.6.0.  Subsequent commits will
require the caller to provide an ExecutorService.
Remove async interface support from OpenStack Cinder API
JCLOUDS-106. Add proper support for generation/detection of keypair/security groups to CloudStack.
JCLOUDS-105. Real fix for keypairs being ignored if VM says it's password-enabled.
JCLOUDS-123: Using Clojure core incubator-specific nilsafe in AMI service binding

Submitted by Trevor Wennblom
JCLOUDS-124: Missing ^:dynamic in Clojure blobstore example

Submitted by Trevor Wennblom
Add license headers to src/test/resources where possible, more fine-grained RAT exclusions
Adding DEPENDENCIES to rat exclude