Ported get_conduits to CR 2.0 [1/2]

This pull request ports get_conduits to CR2.0, and includes adding a method
to Node to retrieve the roles associated with a given node.


 crowbar_framework/app/models/node.rb |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

Crowbar-Pull-ID: 7f3f471cd8703ba20ddc1aa67cbbc53fcb956339

Crowbar-Release: development