tests/calcs/risk/general_test:
tests/calcs/risk/general_test:

Fixed up the `ParseVulnerabilityModelTestCase` tests to check for specific
error messages, since there many places in the function under test which
can throw the same type of exception.


Former-commit-id: 4603f76599a21d18e12b2e863d67aebaba388f8f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine