chore, change travis language to cpp

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, name the complete row of the matrix that we allow to fail

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'next'

* next:
  chore, name the complete row of the matrix that we allow to fail
  chore, change travis language to cpp