tests/input/logictree_test:
tests/input/logictree_test:

Updated `test_source_type` to include a characteristic source in the test
cases.


Former-commit-id: 4baba5228738a1b0e8abbdfb9bf89b10924b00de [formerly 71d30c9aee1353c4e3db1a6cfba3ea40cbdd44a1]
Former-commit-id: b3a1ddab92093aa9f7ec8271445bcb3ec42ceaca
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine