* test(backend); change and remove disk tests

issue #198

* test(backend); check new disk volumes added

test also new volumes are shown in frontend

issue #198

* feature(requests): change disk settings

and prepare the ground for change other hardware settings

issue #198

* wip(backend): refresh machine if allowed

issue #198

* refactor(volumes): get volume info

before we were only getting target

issue #198

* refactor(test): clean before and after

issue #198

* refactor(test): get proper exit error

issue #198

* refactor(test): get proper volume info

issue #198

* refactor(test): clean before and after

issue #198

* wip(volumes): store volume information

issue #198

* wip(volumes): disk drivers definitions

issue #198

* refactor(test); fixed remove test

We were removing the wrong machine

issue #198

* refactor(test): properly return if failed

issue #198

* feature(volumes): remove/list/change disk volumes...