Merge pull request #19464 from petervanderbeken/1013802

Bug 1013802 - Include utils.js in hotspot_test.js so that openDialog is defined r=crh0716
(cherry picked from commit 1b5ea790c10f3ae4fc1c08f04df8c59777b3ef73)

a=tests
Merge branch 'v1.3' into v1.3t