Also don't try to shut down VM if it's already off, otherwise VSphere would raise an error: "The attempted operation cannot be performed in the current state (Powered off)."
* Add golangci-lint as linting tool
* Disable failing staticchecks to start; GitHub issue to handle coming soon
* Run `goimports -w` to repair all source files that have improperly
formatted imports
* makefile: Add ci-lint target to run on travis
This change adds a new make target for running golangci-lint on newly
added Go files only. This target is expected to run during Packer ci builds.
* .github/contributing: Add code linting instructions
* travis: Update job configuration to run parallel builds
Vladislav Rassokhin
Wilken Rivera
Megan Marsh
Chris Doherty