Switch to ruby_task_helper

It was determined that original pattern did not provide any additional
value over more established ones.

Author: ody

metadata.json

@@ -39,6 +39,10 @@
     {
       "name": "puppetlabs/inifile",
       "version_requirement": ">= 5.2.0 < 6.0.0"
+    },
+    {
+      "name": "puppetlabs/ruby_task_helper",
+      "version_requirement": ">= 0.6.1 < 1.0.0"
     }
   ],
   "operatingsystem_support": [

tasks/get_psql_version.json

@@ -1,5 +1,6 @@
 {
   "description": "Run on a PE PSQL node to return the major version of the PSQL server currently installed",
   "parameters": { },
+  "files": ["ruby_task_helper/files/task_helper.rb"],
   "input_method": "stdin"
 }

tasks/get_psql_version.rb

@@ -1,24 +1,15 @@
 #!/opt/puppetlabs/puppet/bin/ruby
 # frozen_string_literal: true
 
+require_relative '../../ruby_task_helper/files/task_helper.rb'
 require '/opt/puppetlabs/puppet/cache/lib/pe_install/pe_postgresql_info.rb'
 
-# GetPEAdmConfig task class
-class GetPSQLInfo
-  def initialize(params); end
-
-  def execute!
+# Task which fetches the installed PSQL server major version
+class GetPSQLInfo < TaskHelper
+  def task
     psql_info = PEPostgresqlInfo.new
-    data = { 'version' => psql_info.installed_server_version }
-    puts data.to_json
+    { 'version' => psql_info.installed_server_version }
   end
 end
 
-# Run the task unless an environment flag has been set, signaling not to. The
-# environment flag is used to disable auto-execution and enable Ruby unit
-# testing of this task.
-unless ENV['RSPEC_UNIT_TEST_MODE']
-  Puppet.initialize_settings
-  task = GetPSQLInfo.new(JSON.parse(STDIN.read))
-  task.execute!
-end
+GetPSQLInfo.run if $PROGRAM_NAME == __FILE__