clutter test: use Clutter::AnimationMode::EASE_IN_QUAD because Travis CI environment does not have clutter 1.12.
clutter test: use Clutter::AnimationMode::EASE_IN_QUAD because Travis CI environment does not have clutter 1.12.

Clutter::AnimationMode::CUBIC_BEZIER has been provied since clutter 1.12.

kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2