Fix: Allow database adapter name "mysql2" in config/database.yml to b…

…e quoted (#42013).

In Redmine 6.0.2 and 5.1.5, due to the change introduced in r23269, using the quoted adapter name `"mysql2"` causes Redmine to fail to start with the error: "Unknown database adapter `"mysql2"` found in config/database.yml".


git-svn-id: https://svn.redmine.org/redmine/trunk@23408 e93f8b46-1217-0410-a6f0-8f06a7374b81

Gemfile

@@ -69,7 +69,7 @@ if File.exist?(database_file)
   if adapters.any?
     adapters.each do |adapter|
       case adapter.strip
-      when 'mysql2'
+      when /mysql2/
         gem 'mysql2', '~> 0.5.0'
         gem "with_advisory_lock"
       when /postgresql/