Transfer Danube reviewer guidelines from wiki

Transfer Danube reviewer guidelines from wiki

The reviewer guidelines will be created per release, where the
CVP/Dovetail releases are aligned to OPNFV releases. The guidelines
outlined in this initial document are for the Danube release.

Updated reviewer guidelines

- Updated to account for issue where mandatory total always shows 215
in current version of web portal; removed one diagram and amended another
- First section title change and wording for test area results

- Removed white space
- Added SUT info section and diagrams
- Modified reference to cvp.opnfv.org with verified.opnfv.org
- Modified reference to cvp@opnfv.org with verified@opnfv.org
- Modified diagram filenames to reflect program name change
- Changed CVP references to OVP and Danube to 2018.01
- Remove TODO for granting marks and escalation - this info is in other docs

Change-Id: I01fc568ce6713d3c60daf339a2630e56e8dbcfcb
Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>