Bump vcap-common

  git shortlog fd6b6d91..9267b079b1
    Dr Nic Williams (1):
      VCAP::Component.register returns its configuration

    Harshawardhan Gadgil (2):
      Add (optional) user guid and space guid to gateway provision request
      Add (optional) provider to GatewayProvisionRequest

    Jesse Zhang (3):
      Move rspec from Gemfile to gemspec
      Add tests for SDSClient
      Only use em-http-request on reactor_thread

    Pieter Noordhuis (3):
      Relax yajl-ruby dependency
      Make varz thread-aware
      Bump patch version

Change-Id: I5612065fdf5dd8310f882c41f7e9ae60aab433f6