Fixed issues on dos.py erase

Change-Id: I825d6ea9cfa7bc63b469eefd35de784137cc26be
Fixed get_node_control_by_name

Change-Id: Iece781aefcfcaef4e2680695a02706467bd1f6a7
Fixing unwanted output from volume_upload

Change-Id: I07fcf6784f0cb1af5ba453cbaa7e0a82f9a61125
Fixes and stubs

Change-Id: I11aed2fcac8f225c8fc3f63a677346234bfd8a5b