fix: pin ffi to 1.15.5 and add gem install ordering for Ruby 2.7 compatibility (#28)

* Initial plan

* fix: pin ffi to 1.15.5 and add ordering to fix Ruby 2.7 CI failures

Agent-Logs-Url: https://github.com/shinesolutions/aem-platform-buildenv/sessions/2ea5dca2-47a2-4b3f-bd58-aa1756ff8b3b

Co-authored-by: cliffano <86285+cliffano@users.noreply.github.com>

* fix: pin mixlib-log for inspec install on Ruby 2.7

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: cliffano <86285+cliffano@users.noreply.github.com>
Co-authored-by: Cliffano Subagio <cliffano@gmail.com>

Author: Copilot

provisioners/aem-platform-buildenv.pp

@@ -101,21 +101,27 @@
   ensure   => '5.1.1',
   provider => 'puppet_gem',
 }
-package { 'train':
-  ensure   => '0.31.0',
+package { 'mixlib-log':
+  ensure   => '3.1.2.1',
   provider => 'puppet_gem',
 }
 package { 'excon':
   ensure   => '1.2.5',
   provider => 'puppet_gem',
 }
 package { 'ffi':
-  ensure   => '1.17.4',
+  ensure   => '1.15.5',
+  provider => 'puppet_gem',
+}
+package { 'train':
+  ensure   => '0.31.0',
   provider => 'puppet_gem',
+  require  => Package['excon'],
 }
 package { 'inspec':
   ensure   => '1.51.6',
   provider => 'puppet_gem',
+  require  => [Package['ffi'], Package['mixlib-log']],
 }
 package { 'capybara':
   ensure   => '3.30.0',