Fix for more strict StatusCode implementation

See gaudi/Gaudi!514 (merged)

• [2018-02-20 00:26] Automatic merge failed in lhcb-gaudi-head-py3#70
• [2018-02-20 00:28] Automatic merge failed in lhcb-tdr-test#65
• [2018-02-20 00:29] Automatic merge failed in lhcb-head#1763
• [2018-02-20 00:29] Automatic merge failed in lhcb-clang-test#867
• [2018-02-20 00:38] Automatic merge failed in lhcb-gaudi-head#1775
• [2018-02-20 08:49] Automatic merge failed in lhcb-gaudi-merge#423
• [2018-02-20 14:07] Automatic merge failed in lhcb-gaudi-merge#424
• [2018-02-21 00:29] Automatic merge failed in lhcb-clang-test#868
• [2018-02-21 00:33] Automatic merge failed in lhcb-gaudi-head#1776
• [2018-02-21 00:33] Automatic merge failed in lhcb-tdr-test#66
• [2018-02-21 00:36] Automatic merge failed in lhcb-head#1764
• [2018-02-21 00:38] Automatic merge failed in lhcb-gaudi-head-py3#71
• [2018-02-21 09:08] Automatic merge failed in lhcb-gaudi-merge#425
• [2018-02-22 01:25] Automatic merge failed in lhcb-gaudi-head-py3#72
• [2018-02-22 01:31] Automatic merge failed in lhcb-clang-test#869
• [2018-02-22 01:32] Automatic merge failed in lhcb-head#1765
• [2018-02-22 01:32] Automatic merge failed in lhcb-gaudi-head#1777
• [2018-02-22 01:34] Automatic merge failed in lhcb-tdr-test#67

@clemenci this MR has merge conflicts. Can you please rebase (possibly on !54 (merged) that is also fixing some StatusCode issues)

This MR is not needed since equivalent fixes are already in !54 (merged)

closed

mentioned in merge request !91 (merged)