Add copyright statements

see LBCORE-1619

added 2 commits

• 470d4230 - Add Gitlab-CI job to check copyright
• 5b83455e - Add missing copyright statements

Compare with previous version

FYI @clemenci and @cattanem, I am now removing the WIP tag, to merge this in asap.

unmarked as a Work In Progress

• [2018-10-24 10:16] Validation started with lhcb-gaudi-merge#619
• [2018-10-24 10:23] Validation started with lhcb-tdr-test#333
• [2018-10-24 14:05] Validation started with lhcb-tdr-test#334
• [2018-10-24 17:58] Validation started with lhcb-gaudi-merge#620
• [2018-10-25 00:17] Validation started with lhcb-lcg-dev4#693
• [2018-10-25 00:18] Validation started with lhcb-lcg-dev3#689
• [2018-10-25 00:18] Validation started with lhcb-head#2032
• [2018-10-25 00:20] Validation started with lhcb-tdr-test#335
• [2018-10-25 00:21] Validation started with lhcb-sanitizers#44
• [2018-10-25 00:31] Validation started with lhcb-gaudi-head#2039
• [2018-10-25 17:02] Validation started with lhcb-gaudi-merge#621
• [2018-10-26 00:19] Validation started with lhcb-head#2033
• [2018-10-26 00:21] Validation started with lhcb-lcg-dev4#694
• [2018-10-26 00:22] Validation started with lhcb-lcg-dev3#690
• [2018-10-26 00:23] Validation started with lhcb-tdr-test#336
• [2018-10-26 00:23] Validation started with lhcb-gaudi-head#2040
• [2018-10-26 00:24] Validation started with lhcb-sanitizers#45
• [2018-10-26 07:50] Validation started with lhcb-tdr-test#337
• [2018-10-26 10:07] Validation started with lhcb-lcg-dev4#695
• [2018-10-26 10:16] Validation started with lhcb-gaudi-merge#622

merged

mentioned in commit 618b1cde

@erodrigu to set up the CI check, cherry-pick this commit and edit the branch name in line 15 of .gitlab-ci.yml

EDIT cherry-pick this commit, not the whole MR!

Thanks @cattanem. Done with !299 (merged).