[KCM]Add KCModuleData

Summary: Use KCModuleData for:
- baloo
- colors
- cursors
- fontscursors
- launch
- lookandfeel
- spellchecking
- smserver
- splash
- style

Reviewers: #plasma, ervin, meven, crossi, hchain

Subscribers: broulik, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D28462



Signed-off-by: Benjamin Port <benjamin.port@enioka.com>

# Conflicts:
#	kcms/cursortheme/kcmcursortheme.cpp