Pack relations tables in Tesla

Cherry-pick of MR !272 (merged) to the master branch.

(cherry picked from commit bd12dabb)

54ac41c2 Always run PackParticlesAndVertices.

• [2018-11-28 00:19] Validation started with lhcb-lcg-dev4#729
• [2018-11-28 00:20] Validation started with lhcb-lcg-dev3#725
• [2018-11-28 00:20] Validation started with lhcb-head#2066
• [2018-11-28 00:21] Validation started with lhcb-sanitizers#78
• [2018-11-28 00:22] Validation started with lhcb-gaudi-head#2074
• [2018-11-28 00:22] Validation started with lhcb-tdr-test#374

merged

mentioned in commit 0d6afe8f