Add golint to scanCode.py

@mrutkows commented on [Tue May 09 2017](https://github.com/apache/incubator-openwhisk/issues/2222)

the openwhisk-cli repo. added "golint" to its specific travis (see https://github.com/apache/incubator-openwhisk-cli/pull/41/files)...

Would be better to catch any formatting/syntax-related errors or warnings for .go files uniformly in scanCode.py so it is uniformly applied to all .go in all repos. (and configurable).

example Travis inclusion:
before_test:
+ - go get -u github.com/golang/lint/golint
+ - go get -d -t ./...

---

@markusthoemmes commented on [Tue May 09 2017](https://github.com/apache/incubator-openwhisk/issues/2222#issuecomment-300177064)

Is this still relevant once the CLI moves out of this repository?

---

@rabbah commented on [Wed Jun 21 2017](https://github.com/apache/incubator-openwhisk/issues/2222#issuecomment-310261703)

@mrutkows seems like this can move to the new utils repo?

Start by locating scanCode.py in the openwhisk-utilities repository and reviewing how its checks are configured. Compare the referenced openwhisk-cli Travis inclusion for golint, then determine how a uniform, configurable Go check would fit. Done means all applicable Go repositories receive the check through the shared utility.

Written by the indexing model from the issue text.