Uses a real go project to showcase vendor example so glide works

[vishal-biyani]

The issue for this PR is explained in #823

Right now a standard go lang project is used but I am ok with creating a small simple Go project in Fission repo and then use that as a dependency for Go vendor example. As long as the project used resolves to an appropriate path by glide - it works.

@life1347 Do you mind taking a look at this please.

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This change is 

[life1347]

Ooops, sorry I didn't know that will break glide up -v.
I think its good idea to add a real go dependency and make it more realistic, let's keep it. But since its a dependency only for example, I suggest adding the following lines into glide.yaml to avoid adding unnecessary dependencies in glide.yaml.

excludeDirs:
- examples
- hack
- test

[vishal-biyani]

I tried excludeDirs but that could not fix Glide issue. I will check once more if I made some mistake in adding that and confirm here.

[life1347]

I tested with glide version: 10.3.1

# glide.yaml
package: github.com/fission/fission
excludeDirs:
- examples
- hack
- test
import:
...

Before adding

[WARN]	Unable to checkout go/vendordir/test
[ERROR]	Error looking for go/vendordir/test: Cannot detect VCS
...
[ERROR]	Failed to retrieve a list of dependencies: Error resolving imports

After

glide up -v without error.

[vishal-biyani]

I will update this PR and close other one.

[vishal-biyani]

@life1347 updated the PR with excludeDirs added

[life1347]

LGTM