Added log for number of assets loaded from exposure file
Added log for number of assets loaded from exposure file


Former-commit-id: a0fab7026423652f188429511dc4cba3262a3b23 [formerly a0fab7026423652f188429511dc4cba3262a3b23 [formerly fca7be847de05fb6bcc68e0c1be72a040f557f37]]
Former-commit-id: abcaf4a67beb9207c4b46c0f465f93d5fbf8ec28
Former-commit-id: 9b77ff38b40df98e35d668585191ad7798eab6a9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine