fixup! Bring back bundler downgrading

downgrade_bundler_on_old_rails seems to trigger for JRuby builds, and if
it doesn't it fails to install sassc on Rails 6 and fails yard check on
Rails 5.2

Author: pirj

.travis.yml

@@ -22,6 +22,7 @@ bundler_args: "--binstubs --path ../bundle --retry=3 --jobs=3"
 
 before_install:
   - script/update_rubygems_and_install_bundler
+  - script/downgrade_bundler_on_old_rails
   - script/clone_all_rspec_repos
 
 before_script:

script/downgrade_bundler_on_old_rails

@@ -0,0 +1,20 @@
+#!/bin/bash
+# This file was generated on 2019-01-03T20:34:23+00:00 from the rspec-dev repo.
+# DO NOT modify it by hand as your changes will get lost the next time it is generated.
+
+set -e
+source script/functions.sh
+
+if ruby -e "exit(ENV['RAILS_VERSION'].scan(/\d+\.\d+.\d+/)[0].to_f < 5)"; then
+  # On Rails versions less than 5, Bundler 2.0 is not supported
+  echo "Warning dowgrading to older version of Bundler"
+  echo "Current bundler versions installed: `gem list | grep '^bundler ('`"
+
+  gem uninstall -aIx bundler || echo "Warning error occured removing bundler via gem"
+
+  rvm @global do gem uninstall -aIx bundler || echo "Warning error occured removing bundler via rvm"
+
+  echo "Bundler version list after uninstall: `gem list | grep '^bundler ('`"
+
+  gem install bundler -v '1.17.3'
+fi