Simplify busid matching code [1/2]

Unless I overlooked something, this should be backwards compatible with the old
code


 .../barclamp/libraries/barclamp_library.rb         | 24 ++++------------------
 1 file changed, 4 insertions(+), 20 deletions(-)

Crowbar-Pull-ID: baca0ec1ac0c56c4847b1c18747abd04377f6bd8

Crowbar-Release: pebbles