Bump src/collector

Bump cloudfoundry/collector:
  Aram Price:
     Be specific about the ruby version ( Travis finished: https://travis-ci.org/cloudfoundry/collector/builds/14559694 )
     Upgrade ruby to 1.9.3-p484 ( Travis Success: https://travis-ci.org/cloudfoundry/collector/builds/14520707 )
Update ruby package to 1.9.3-p484

  * add new blob for ruby
  * update packaging spec