Migrate go Go Modules

[Waterdrips]

We should move OFC components to Go Modules.

This will be a 2 (or more) part process where

1. first off we need a go.mod in each folder.
2. implement modules in the folders

We need to do 1, with a commit into aster because otherwise when you import something like openfaas-cloud/sdk dep pulls the openfaas-cloud repo as a whole, then you have 2 copies on path of the current module (github-event say) and go mod complains about duplicated modules.

Expected Behaviour

go code using go mod with vendoring for dependancies

Current Behaviour

we are using dep