1. No functional change just upgrade to go1.11.
2. Add go mod support.
3. Make vendored copy of dependencies
Test
1. hmake
2. run worker_test.go in GoLand IDE
gas is now gosec. Need to update security scan and fix
security issue as needed.
No functional change.
Jira CNA-2022
Change-Id: I36f2a204114f3f13e2ed05579c04a9c89f528f9a