[cxxmodules] CIFactory now uses MultiplexConsumer

[Teemperor]

This is a preparation for C++ modules as they will require that
we attach multiple consumers to the CI.

[phsft-bot]

Starting build on centos7/gcc49, mac1012/native, slc6/gcc49, slc6/gcc62, ubuntu14/native with flags -Dvc=OFF -Dimt=ON -Dccache=ON
How to customize builds

[Teemperor]

I moved this into an extra PR because it somehow the CIFactory patch from #930 fails a certain test. If this also fails this test, then I at least know it's related to this ASTConsumer (as everything else should be behind a if(modules)).

[Teemperor]

@phsft-bot build

[phsft-bot]

Starting build on centos7/gcc49, mac1012/native, slc6/gcc49, slc6/gcc62, ubuntu14/native with flags -Dvc=OFF -Dimt=ON -Dccache=ON
How to customize builds

[phsft-bot]

Starting build on centos7/gcc49, mac1012/native, slc6/gcc49, slc6/gcc62, ubuntu14/native with flags -Dvc=OFF -Dimt=ON -Dccache=ON
How to customize builds

[phsft-bot]

Build failed on slc6/gcc62.
See console output.

Failing tests:

• projectroot.roottest.root.meta.ROOT-7462.roottest_root_meta_ROOT_7462_make

[phsft-bot]

Build failed on slc6/gcc49.
See console output.

Failing tests:

• projectroot.roottest.root.meta.ROOT-7462.roottest_root_meta_ROOT_7462_make

[phsft-bot]

Build failed on ubuntu14/native.
See console output.

Failing tests:

• projectroot.roottest.root.meta.ROOT-7462.roottest_root_meta_ROOT_7462_make

[phsft-bot]

Build failed on centos7/gcc49.
See console output.

Failing tests:

• projectroot.roottest.root.meta.ROOT-7462.roottest_root_meta_ROOT_7462_make

[Teemperor]

@vgvassilev @Axel-Naumann any clue why this is failing this test? The only outside visible change should be that you now no longer can do getASTConsumer() and then cast it to the custom consumer type, but I don't see any point where we do this.

[phsft-bot]

Build failed on mac1012/native.
See console output.

Failing tests:

• projectroot.roottest.root.meta.ROOT-7462.roottest_root_meta_ROOT_7462_make

[Axel-Naumann]

No clues from me. But I hear gdb calling...

[Teemperor]

Closing this, it's already part of the #930 PR