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.