rtt_ros_comm: do not latch topics by default

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
rtt_ros_comm: it's cp.init, not cp.init_connection

Signed-off-by: Ruben Smits <ruben.smits@intermodalics.eu>
rtt_ros_integration: removed rtt_kdl_conversions from metapackage
rtt_ros_tests/rtt_rospack_tests: fixed tests for rtt_rospack due to changed service name (see 5b91757)
rtt_ros: added missing dependency to package roslib
Merge branch 'hydro-devel' of https://github.com/orocos/rtt_ros_integration into rtt_dynamic_reconfigure