[Cbc] Segfaults / wrong infeas

[Gleb Belov]

Hi,

I have a bunch of models where CBC 2.9.7 produces a segfault or gets 
ulimit-killed after 25 minutes without any output. For 3 instances, 
infeasibility is wrongly reported.

The models and solver outputs are here: 
https://www.dropbox.com/sh/r0k9qony9z32a3k/AACvnaSVFUFBF1NScRkdkIOga?dl=0

Folder FAILED_noPrepro has the models where CBC fails when "-preprocess 
off" is given to callCbc.

Would be good to have those cases corrected as we want to recommend CBC 
as the default MIP backend in our toolchain

Gleb