search/replace old hardcoded types from plasmapkg2

there is a single difference between command line
parameters of plasmapkg2 and kpackagetool5: plasmapkg2
had some hardcoded names like "theme", "plasmoid" etc.
kpackagetool5 requires the servicetype name to be
passed instead. in order to stay compatible convert
those parameter with the proper servicetype name.
it's parsing parameters by hand in order to just
pass anything else without further parsing

BUG:374463
REVIEW:129753
Change-Id: I6adece9b3dd351331d747505c455e0f79cd0ecf7