 VAGOV-2014: q & a accordion section headers (#9807)
 VAGOV-2014: q & a accordion section headers (#9807)

* VAGOV-2014: make q-a section h2s look like h3s

* VAGOV-2014: use heading level 3 class

* VAGOV-2014: remove unnecessary class

* VAGOV-2014: - accordion section headers get h3 style - non-accordion sections get h2 style

department-of-veterans-affairs/vets-website,department-of-veterans-affairs/vets-website