Fix result parsing from hazenlib output

[sophie22]

hazenlib task returns a dictionary with format: { "task and image specific key": {'measurement': 'value'}, "reports": {flexible, including path to report images as list of strings} } also includes filename change of report.html to reports.html

[heyhaleema]

Note:hazenlib needs to be updated, i.e. pip uninstall hazen and then re-run pip install -r requirements.txt