Revert "Don't run Rails migration on Travis for QUNIT only tests."

This reverts commit 238d83c6e6.

.travis.yml

@@ -55,7 +55,7 @@ before_install:
   - eslint test/javascripts
 
 before_script:
-  - bash -c "if [ '$QUNIT_RUN' == '0' ]; then bundle exec rake db:create db:migrate; fi
+  - bundle exec rake db:create db:migrate
 
 install:
   - bash -c "if [ '$RAILS_MASTER' == '1' ]; then bundle update --retry=3 --jobs=3 arel rails seed-fu; fi"