MFH creating rubygem-rails-dom-testing1 and multiple gem ports using it

MFH: r430420 r430422 r430423 r430426

textproc/rubygem-rails-dom-testing1: create port

Create port for 1.x version of rubygem-rails-dom-testing for the ports that
still need the older version.

devel/rubygem-actionview: switch to rubygem-rails-dom-testing 1.x dep

mail/rubygem-actionmailer4: switch to rubygem-rails-dom-testing 1.x dep

www/rubygem-actionpack4: switch to rubygem-rails-dom-testing 1.x dep