Fixes Selenium tests failing #710
Fixes Selenium tests failing #710

Test broke when `<h2 class="page-title">{{greeting}}</h2>`  was changed to `<h1 class="page-title">{{greeting}}</h1>`.  See:

https://github.com/PolymerElements/polymer-starter-kit/blob/master/app/elements/my-greeting/my-greeting.html#L27
stefanoantonel/brainpower,StartPolymer/polymer-starter-kit-plus,stefanoantonel/brainpower,flaiker/polymer-starter-kit,Ex-ante-Labs/pivot-ahead,alexpaluzzi/polymer-starter-kit,StartPolymer/polymer-starter-kit,plusCubed/pluscubed-site,gick/mobile-polymer-starter-2,gick/reveries-project,plusCubed/pluscubed-site,markovuksanovic/polymer-starter-kit,FaellCarvalho/Geo-Location,FaellCarvalho/Geo-Location,gick/reveries-project,Ex-ante-Labs/shopper.ninja,markovuksanovic/polymer-starter-kit,mtusk/polymer-starter-kit,abdonrd/polymer-starter-kit,klarkc/polymer-loopback-starter-kit,alexpaluzzi/polymer-starter-kit,Ex-ante-Labs/shopper.ninja,semafloor/semafloor-test-alpha,semafloor/semafloor-test-alpha,StartPolymer/polymer-starter-kit,gick/mobile-polymer-starter-2,abdonrd/polymer-starter-kit,Serious-Rage/poligomy,mtusk/polymer-starter-kit,gick/mobile-polymer-starter-2,klarkc/polymer-loopback-starter-kit,Ex-ante-Labs/pivot-ahead,lordoftheflies/mlm-portal,StartPolymer/polymer-starter-kit-plus,klarkc/polymer-loopback-starter-kit,Serious-Rage/poligomy,alexpaluzzi/polymer-starter-kit,gick/reveries-project,Serious-Rage/poligomy,flaiker/polymer-starter-kit,anthonybrown/polymer-starter-kit,anthonybrown/polymer-starter-kit,semafloor/semafloor-test-alpha,FaellCarvalho/Geo-Location,lordoftheflies/mlm-portal,lordoftheflies/mlm-portal,markovuksanovic/polymer-starter-kit