Minor devtest documentation fixes

Small documentation fixes (mostly, to get pretty view in browser):
 - removed redundant `##` from rendered document
 - moved footnotes from devtest_end.sh to devtest_seed.sh

Change-Id: Iab524e042b35d6b5fd85fa4f78aa00c76266c8c5
Pass baremetal-interface to defined XML

In the configure-vm script we allow a baremetal-interface to be defined
but we were not passing this to the XML that's created for the VM. Fixing
this.

Change-Id: Id54106c34816804c7f953e2d41e782ab838a200a
Merge "Pass baremetal-interface to defined XML"