Fix linter exemptions in golint

We were having issues with golint not properly reporting declaration of functions
without proper documentation (comments). This is due to a config with golangci.

See: https://github.com/golangci/golangci-lint/issues/456

.golangci.yml

@@ -14,3 +14,12 @@ linters:
     - varcheck
     - deadcode
     - misspell
+
+issues:
+  exclude-use-default: false
+  exclude:
+    # EXC0001 errcheck: Almost all programs ignore errors on these functions and in most cases it's ok
+    - Error return value of .((os\.)?std(out|err)\..*|.*Close|.*Flush|os\.Remove(All)?|.*print(f|ln)?|os\.(Un)?Setenv). is not checked
+
+    # EXC0003 golint: False positive when tests are defined in package 'test'
+    - func name will be used as test\.Test.* by other packages, and that stutters; consider calling this