Use vagrant-spec from hashicorp org

.github/workflows/go-spectest.yml

@@ -50,9 +50,8 @@ jobs:
       - name: Get vagrant-spec repo
         uses: actions/checkout@v2
         with:
-          repository: 'soapy1/vagrant-spec'
+          repository: 'hashicorp/vagrant-spec'
           path: vagrant-spec
-          ref: use-full-vagrant-path-if-executable
       - name: Install and run vagrant-spec
         run: |
           pushd vagrant-spec

test/vagrant-spec/configs/vagrant-spec.config.virtualbox.rb

@@ -5,7 +5,7 @@ Vagrant::Spec::Acceptance.configure do |c|
   c.skeleton_paths << File.expand_path("../test/acceptance/skeletons", __FILE__)
   # Allow for slow setup to still pass
   c.assert_retries = 15
-  c.vagrant_path = ENV["VAGRANT_PATH"]
+  c.vagrant_path = ENV.fetch("VAGRANT_PATH", "vagrant")
   c.provider "virtualbox",
     box: ENV["VAGRANT_SPEC_BOX"],
     contexts: ["provider-context/virtualbox"]