Update to describe tasks and parameters to tasks, including the install
parameters requested in 4470.  Added more information to the vm section,
and included a section documenting the test suites.

Signed-off-by: Warren Usui <warren.usui@inktank.com>
Fixes: 4470
Reviewed By: Dan Mick and Alfredo Deza

Include Alfredo's suggestions
Merge branch 'wip-teuthREAD-wusui'