Revert "cob_perception_common: 0.5.11-0 in 'hydro/distribution.yaml' [bl...

Reverts ros/rosdistro#5468  @ipa-fmw 

This release is building packages numbered 0.6.1 but declares itself 0.5.11 causing the buildfarm to infinite loop. 

I think the upstream was incorrect when running the release.