Triage and address static code analysis issues

[ossdhaval]

Triage all static code analysis issues reported on Codacy
After triage, all issues that we agree to fix, should be made into project issue on appropriate Github repo.
Simpler issues should be marked 'good first issue'. This also aligns with 'CII best practices`

Benefit: Improves product stability

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Due: 30th June 2021

[ossdhaval]

Partially achieved.
This has been taken care by having Sonar integration with PRs. PRs can only merge after it passes quality gate.

What is remaining is to triage all backlog issues and identify which issues need immediate attention ( like high risk and security hotspots ). And fix those. Keeping this issue open for now.