Preparing for Indigo Sync 2018-12-10

Indigo Maintainers,

We have just over 100 packages to sync I’ve identified one regression in a recent release which we’re rolling back Revert "rotors_simulator: 2.2.1-0 in 'indigo/distribution.yaml' [bloom]" by tfoote · Pull Request #19674 · ros/rosdistro · GitHub

Otherwise we look good to sync. Please comment back here if there are any unknown issue otherwise I will plan to hold new indigo releases and sync the packages on Wednesday.

The sync is out: