add changelog item
add changelog item


Former-commit-id: 0d5155dcaf12e33d55ee7a5571f56a95ff66b2e9 [formerly f18e17a6e7f80000b6dc781c6c7592cb1586d7fe]
Former-commit-id: 3b9da98edcddf864fcf73b0cb5d3b90c875f7e10
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine