Fixes to get_available vms, add_group, add_keypair, terminate_instances.
Fixes to get_available vms, add_group, add_keypair, terminate_instances.

Added check_group(), delete_keypair(), delete_group()

sjones4/eutester,nephomaniac/eutester,tbeckham/eutester,nagyistoce/eutester,tbeckham/eutester,nagyistoce/eutester,nephomaniac/nephoria,tbeckham/eutester,tbeckham/eutester,nephomaniac/eutester,nephomaniac/eutester,sjones4/eutester,shaon/eutester,shaon/eutester,nagyistoce/eutester,nephomaniac/nephoria,nagyistoce/eutester,sjones4/eutester,sjones4/eutester,shaon/eutester,shaon/eutester