ros-metapackages is marked for autoremoval from testing

[Debian testing autoremoval watch]

ros-metapackages 1.9 is marked for autoremoval from testing on 2018-06-03

It is affected by these RC bugs:
896643: ros-robot-python-dev: Depends on NBS python-tf-conversions

It (build-)depends on packages with these RC bugs:
896236: python-tf2-kdl: tf2_kdl fails to import
896294: python-tf: tf fails to import
896394: python-tf2-sensor-msgs: tf2_sensor_msgs fails to import
896409: python-tf2-ros: tf2_ros fails to import
896413: python-tf2-geometry-msgs: tf2_geometry_msgs fails to import