tests/data/mixed_source_model.xml:
tests/data/mixed_source_model.xml:

Added characteristic source examples (3) to test file.


Former-commit-id: 4c4cdb0f8c76d6cd9fc75b9dffb56d5e3a3cc7c9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine