Fix charset/collate in mysql recreate_database

See new method mysql_creation_options. It is used by both
create_database and recreate_database so they are consistent.

(Cherry pick of 3ba3125)

activerecord/lib/active_record/railties/databases.rake

@@ -44,6 +44,12 @@ db_namespace = namespace :db do
     create_database(ActiveRecord::Base.configurations[Rails.env])
   end
 
+  def mysql_creation_options(config)
+    @charset   = ENV['CHARSET']   || 'utf8'
+    @collation = ENV['COLLATION'] || 'utf8_unicode_ci'
+    {:charset => (config['charset'] || @charset), :collation => (config['collation'] || @collation)}
+  end
+
   def create_database(config)
     begin
       if config['adapter'] =~ /sqlite/
@@ -67,9 +73,6 @@ db_namespace = namespace :db do
     rescue
       case config['adapter']
       when /mysql/
-        @charset   = ENV['CHARSET']   || 'utf8'
-        @collation = ENV['COLLATION'] || 'utf8_unicode_ci'
-        creation_options = {:charset => (config['charset'] || @charset), :collation => (config['collation'] || @collation)}
         if config['adapter'] =~ /jdbc/
           #FIXME After Jdbcmysql gives this class
           require 'active_record/railties/jdbcmysql_error'
@@ -80,7 +83,7 @@ db_namespace = namespace :db do
         access_denied_error = 1045
         begin
           ActiveRecord::Base.establish_connection(config.merge('database' => nil))
-          ActiveRecord::Base.connection.create_database(config['database'], creation_options)
+          ActiveRecord::Base.connection.create_database(config['database'], mysql_creation_options(config))
           ActiveRecord::Base.establish_connection(config)
         rescue error_class => sqlerr
           if sqlerr.errno == access_denied_error
@@ -443,7 +446,7 @@ db_namespace = namespace :db do
       case abcs['test']['adapter']
       when /mysql/
         ActiveRecord::Base.establish_connection(:test)
-        ActiveRecord::Base.connection.recreate_database(abcs['test']['database'], abcs['test'])
+        ActiveRecord::Base.connection.recreate_database(abcs['test']['database'], mysql_creation_options(abcs['test']))
       when /postgresql/
         ActiveRecord::Base.clear_active_connections!
         drop_database(abcs['test'])