RawEvent::Bank: Add move c'tor and assignment and deprecated copy c'tor and assignment

Deprecate old copy c'tor and assignment, as they are ill-defined (they result in both the current and 'old' object to have identical m_owns, which in case it is set to true will result in a double delete). Instead, add move c'tor and move assignment

changed the description

• [2018-04-21 00:11] Validation started with lhcb-lcg-dev3#501
• [2018-04-21 00:12] Validation started with lhcb-gaudi-head-py3#130
• [2018-04-21 00:12] Validation started with lhcb-lcg-dev4#501
• [2018-04-21 00:13] Validation started with lhcb-clang-test#927
• [2018-04-21 00:15] Validation started with lhcb-gaudi-head#1842
• [2018-04-21 00:17] Validation started with lhcb-head#1825
• [2018-04-21 00:28] Validation started with lhcb-tdr-test#126
• [2018-04-21 08:26] Validation started with lhcb-gaudi-merge#494

merged

mentioned in commit 2085316a

mentioned in commit 5ef29b01

mentioned in commit de5a9201

mentioned in commit 6a2e2174

mentioned in merge request !1792 (closed)

mentioned in merge request !1815 (closed)

mentioned in commit 5f078d8f