rtt_tf: add -DRTT_COMPONENT definition for tests (required if not set by ros_generate_rtt_typekit)
Added dependencies to orocos_generate_package() calls

Signed-off-by: Johannes Meyer <johannes@intermodalics.eu>
Removed explicit calls to catkin_package()

This requires patch https://github.com/orocos-toolchain/rtt/commit/2103f2912be1a32eafbbd6ae41bdde98966d890f in rtt.

Signed-off-by: Johannes Meyer <johannes@intermodalics.eu>