Merge pull request #38 from shapeblue/outofband-master

CLOUDSTACK-9299: doc for out-of-band managementAdmin documentation for out-of-band management feature

cc @pdion891 @swill

* pr/38:
  CLOUDSTACK-9299: doc for out-of-band management

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>