export/hazard:

Corrected the disagg export filename.
tests/export/hazard_test:

Updated tests to coverage the fix for the disagg file name.

100% coverage of `_get_result_export_path` maintained.
Merge pull request #1137 from larsbutler/fix-disagg-export-file-name

Fix disagg export file name

[r=micheles] [f=1163276]