Added fixtures for risk tests

Risk QA tests requires high resolution hazard data in order to generate outputs that converges enough to the expected results.

As it is impractical to compute hazard data before executing the tests (it will take days on a laptop), it is better to store in a dump the test fixture needed to run the tests.

This pull request addresses this problem by 

1) adding the test fixtures in the folder qa_tests/risk/
2) updating the packager.sh script, such that it loads the fixtures before executing the qa tests.