fix deprecations and failures in errors spec by converting form to @form, avoiding block spoping issues
fix deprecations and failures in errors spec by converting form to @form, avoiding block spoping issues

thenthen8515/formtastic,ConferenceCloud/formtastic,Baltazore/formtastic,EndingChaung/formtastic,nishaya/formtastic,Guestfolio/formtastic,Guestfolio/formtastic,ryanfox1985/formtastic,crashlytics/formtastic,thenthen8515/formtastic,EndingChaung/formtastic,Davidzhu001/formtastic,ryanfox1985/formtastic,justinfrench/formtastic,ConferenceCloud/formtastic,paulodiovani/formtastic,mikz/formtastic,Davidzhu001/formtastic,ryanfox1985/formtastic,mikz/formtastic,nishaya/formtastic,justinfrench/formtastic,paulodiovani/formtastic,justinfrench/formtastic,sideci-sample/sideci-sample-formtastic