Support for Deregistering image and deleting associated snapshots

v0.22.0-pre2

removed snapshot output validation

Support for Deleting Image

v0.22.0-pre

logged a warning

Support for deleting Snapshots

Support for deleting Snapshot (#39)

* Deleting snapshot by ID

* Work in progress

* Unit test

* fix comments

Support for Attaching volumes

Attach volume for an instance (#34)

* Attaching volume to Instance

* Unit test case

* Unit test

* fixed comments

* updateInstanceType  orch for UpdateAttributes

* Fixed comments

* Fix validation

* Resolved comments

Support for Detaching volumes

Support for Detaching volume in an instance (#38)

* Detaching volume from an instance

* Detach volume - work in progress

* Detaching volume-unit test

* Detach Volume Unit test

* Fixed Comments

* fixed format specifier for boolean

Support for creating Snapshot-updating tags for volumes

Fix for updating tags for volumes in an instance

Fix for creating volumes from snapshot

v0.18.2

Bug fix to check size (#37)

List attached volumes using instanceId

Properly list attached volumes (#33)

* use attachment instance-id

* fixup

List attached volumes using instanceId

v0.18.1-pre

fixup

Support for snapshot creation

Support to create snapshot (#32)

* Handler to create snapshot

* Handler for creating snapshot

* Added unit test case

* Fixed comments