node_manager_fkie: fixed pakage_name result
added caching for package_name results
node_manager_fkie: capability_group parameter can now be defined in a namespace
default_cfg_fkie: capability_group parameter can now be defined in a namespace
node_manager_fkie: clear cached package names on refreshing launch file view
node_manager_fkie: fixed file paths (removed warnings in file_watcher)
default_cfg_fkie: fix capabilities group parsing