Ported get_conduits to CR 2.0. [1/2]

This pull request ports the get_conduits call to CR 2.0.
Part of this pull adds a method to Node to retrieve the roles associate with the node.


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

Crowbar-Pull-ID: 05a8fd76682547f32d638919db2c1527298c3f8a

Crowbar-Release: development