(maint) Revive spec tests

The PDK update from a previous commit was a little too aggressive and
got rid of some things we need to run spec tests on this module.
Re-adding those things along with some other changes, this change
restores our ability to run the spec tests on this repo. For the future,
when we want to run these spec tests in a github action, we'll need to
set up credentials to clone test fixtures that are now all in private
repos.

Author: eputnam

.fixtures.yml

@@ -17,20 +17,20 @@ fixtures:
   repositories:
     puppet-enterprise-modules:
       repo: 'git@github.com:puppetlabs/puppet-enterprise-modules.git'
-      ref: 'origin/kearney'
+      ref: 'origin/2019.8.x'
       target: 'spec/fixtures'
     pe_r10k:
         repo: "git@github.com:puppetlabs/puppetlabs-pe_r10k.git"
         ref: origin/2016.2.x
     enterprise_tasks:
         repo: "git@github.com:puppetlabs/enterprise_tasks.git"
-        ref: origin/master
+        ref: origin/main
     pe_xl:
         repo: "git@github.com:reidmv/reidmv-pe_xl.git"
         ref: origin/main
     provision:
         repo: "git@github.com:puppetlabs/provision.git"
-        ref: origin/master
+        ref: origin/main
 
   symlinks:
      puppet_enterprise: "#{source_dir}/spec/fixtures/puppet-enterprise-modules/modules/puppet_enterprise"

Gemfile

@@ -61,6 +61,7 @@ group :development do
   gem "rb-readline", '= 0.5.5',                  require: false, platforms: [:mswin, :mingw, :x64_mingw]
   gem "bigdecimal", '< 3.2.2',                   require: false, platforms: [:mswin, :mingw, :x64_mingw]
   gem "puppet-resource_api",                     require: false
+  gem 'webmock', '~> 3.0',                       require: false
 end
 group :development, :release_prep do
   gem "puppet-strings", '~> 4.0',         require: false

spec/spec_helper.rb

@@ -6,6 +6,7 @@
 
 require 'puppetlabs_spec_helper/module_spec_helper'
 require 'rspec-puppet-facts'
+require 'shared/contexts'
 
 require 'spec_helper_local' if File.file?(File.join(File.dirname(__FILE__), 'spec_helper_local.rb'))
 
@@ -14,6 +15,19 @@
 default_facts = {
   puppetversion: Puppet.version,
   facterversion: Facter.version,
+  platform_symlink_writable: true,
+  path: '/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/bin',
+  os: {
+    'family' => 'RedHat',
+    'name'                   => 'CentOS',
+    'release'                => {
+      'major' => '6',
+    },
+  },
+  pe_build: '2018.1.0',
+  platform_tag: 'el-7-x86_64',
+  memory: { 'system' => { 'total_bytes' => 4_294_967_296 } },
+  processors: { 'count' => 1 }
 }
 
 default_fact_files = [