MessageCore(cleanup): use CamelCase includes.

2 jobs for master in 23 minutes and 10 seconds (queued for 82 minutes and 9 seconds)
Status Job ID Name Coverage
  Build
failed #88778
build_clazy_clang_tidy

00:06:18

passed #88777
linux kf5-qt5 qt5.15

00:16:51

36.0%
 
Name Stage Failure
failed
build_clazy_clang_tidy Build
make[2]: *** [messageviewer/src/messagepartthemes/default/autotests/CMakeFiles/converthtmltoplaintexttest.dir/build.make:133: bin/converthtmltoplaintexttest] Error 1
make[1]: *** [CMakeFiles/Makefile2:3030: messageviewer/src/messagepartthemes/default/autotests/CMakeFiles/converthtmltoplaintexttest.dir/all] Error 2
make: *** [Makefile:160: all] Error 2
Uploading artifacts for failed job
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1