MM - 19155 Change plugin helpers files to be golint complied (#12686)

* MM-19155 Change plugin helpers files to be golint complied

* add makefile target that checks if plugin/helpers files are golint
  compliant

* MM-19155 - Change plugin helpers files to be golint complied

* added comment documentation to exported plugin/helpers methods
* changed variable names to be compliant with golint

* Address feedback

Makefile

@@ -230,7 +230,10 @@ check-prereqs: ## Checks prerequisite software status.
 	./scripts/prereq-check.sh
 
 # TODO: remove govet and gofmt checks once golangci-lint is being enforced.
-check-style: govet gofmt check-licenses ## Runs govet and gofmt against all packages.
+check-style: govet gofmt check-licenses check-plugin-golint ## Runs govet and gofmt against all packages and also ensures plugin package golint compliant
+
+check-plugin-golint: # Checks if golint returns any uncompliant code for any file that starts with plugin/helpers
+	@! golint ./plugin/ | grep plugin/helpers
 
 test-te-race: ## Checks for race conditions in the team edition.
 	@echo Testing TE race conditions