let formatter plugin clean up submodules
omod-1.9/1.10, ... where all exempt from formatting
now that the formatter runs on all submodules, let him cleanup
RESTWS-617 Ensure formatter plugins runs on all submodules
formatter was only configured to run on omod/omod-common
plugin now runs by default in all mvn modules since they inherit this
build config (therefore removed the plugin entry in omod/omod-common)
