Increase test coverage in fabric8-analytics-stack-analysis repository to > 90%

[sara-02]

Description:

Current coverage for the repo is at 57%, the aim is to improve this to at least 90%

Acceptance criteria

• [ ] test coverage above 90%
• [ ] all modules are covered
• [ ] code coverage displayed on the QA Dashboard

Additional info

• QA Dashboard: https://fabric8-analytics.github.io/dashboard/dashboard.html
• Parent Planner Issue: https://openshift.io/openshiftio/openshiftio/plan/detail/2464

[sara-02]

@abs51295 I will be needing some help in this from you, that is why I have added you to the assignee.