demote some errors and suppress some warnings if using bsc 2014 or newer
demote some errors and suppress some warnings if using bsc 2014 or newer

Change-Id: I8b13a1372cd01abda46a951c88427e73b7bf1695

chenm001/connectal,cambridgehackers/connectal,cambridgehackers/connectal,8l/connectal,cambridgehackers/connectal,hanw/connectal,chenm001/connectal,8l/connectal,8l/connectal,csail-csg/connectal,8l/connectal,hanw/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,csail-csg/connectal,chenm001/connectal,cambridgehackers/connectal,hanw/connectal,hanw/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal,8l/connectal,hanw/connectal