Fix linters and add golint

[tac0turtle]

• fixed some outstanding linters and added golint

Signed-off-by: Marko Baricevic marbar3778@yahoo.com

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Re-reviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #5048 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #5048      +/-   ##
=========================================
- Coverage   55.01%     55%   -0.01%     
=========================================
  Files         291     291              
  Lines       17819   17815       -4     
=========================================
- Hits         9803    9800       -3     
+ Misses       7309    7308       -1     
  Partials      707     707

[tnachen]

This looks great to add!

[alexanderbez]

ACK 🎉