update changelog with latest 3.4 version
update changelog with latest 3.4 version


Former-commit-id: 576d8666d76adfc4a87752faab9bc5ad711d83c1 [formerly f57068fee596d82bf50ef5749b6aa23446ae3af3]
Former-commit-id: f4912512ddb9ad73b3987d5d775d645433c94e8d
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine