Added fix for build failing due to missing go-vnc

[dongyuzheng]

Fix for:

dzheng@dzheng-ubuntu-desktop:~/go/src/github.com/xenserver/packer-builder-xenserver$ ./build.sh 
==> Removing old directory...
Number of parallel builds: 7

-->     linux/amd64: github.com/xenserver/packer-builder-xenserver/plugin/builder-xenserver-xva
-->     linux/amd64: github.com/xenserver/packer-builder-xenserver/plugin/builder-xenserver-iso

2 errors occurred:
--> linux/amd64 error: exit status 1
Stderr: builder/xenserver/common/step_type_boot_command.go:7:2: cannot find package "github.com/mitchellh/go-vnc" in any of:
    /home/dzheng/go/src/github.com/xenserver/packer-builder-xenserver/vendor/github.com/mitchellh/go-vnc (vendor tree)
    /usr/local/go/src/github.com/mitchellh/go-vnc (from $GOROOT)
    /home/dzheng/go/src/github.com/mitchellh/go-vnc (from $GOPATH)

--> linux/amd64 error: exit status 1
Stderr: builder/xenserver/common/step_type_boot_command.go:7:2: cannot find package "github.com/mitchellh/go-vnc" in any of:
    /home/dzheng/go/src/github.com/xenserver/packer-builder-xenserver/vendor/github.com/mitchellh/go-vnc (vendor tree)
    /usr/local/go/src/github.com/mitchellh/go-vnc (from $GOROOT)
    /home/dzheng/go/src/github.com/mitchellh/go-vnc (from $GOPATH)

[timoc]

Does this fix the problem of using xenserver with packer 1.0?

[dongyuzheng]

I'm not sure what you're referring to. Please be more specific with your problem.

[timoc]

I've been trying to use packer xen plugin with the packer 1.0 builds without success. not being much of go person i'm having trouble with it. thought this might fix it.

[Vagrantin]

Hello,
A merge would be welcome because this fix (#60) solve my issue with go-vnc missing.

[dongyuzheng]

Hi @Vagrantin , please try this fork instead: https://github.com/ctlam/packer-builder-xenserver

[Vagrantin]

Hi @Vagrantin , please try this fork instead: https://github.com/ctlam/packer-builder-xenserver

Thanks, what is the goal of this fork, you mean this current repo is not maintained anymore ?

[timoc]

Please review for merge.

[dongyuzheng]

what is the goal of this fork

Hi @Vagrantin, I was at NVIDIA back in 2016 and we needed some new features / bug fixes to this repo. At the time, I made many Pull Requests, which remain unaddressed to this day.

If you look at the fork history, you'd see that

https://github.com/NVIDIA/packer-builder-xenserver
--> comes from https://github.com/ctlam/packer-builder-xenserver
--> comes from https://github.com/iyyuan/packer-builder-xenserver
--> from my repo https://github.com/dongyuzheng/packer-builder-xenserver
--> from this repo https://github.com/xenserver/packer-builder-xenserver

But https://github.com/ctlam/packer-builder-xenserver is the one most ahead right now, so that is the one I'd recommend.