clutter test: add omit to easing_delay test
clutter test: add omit to easing_delay test

Older clutter does not work correctly `Clutter::Actor#easing_delay`? :<

In Clutter 1.14, this easing_delay property methods work fine.

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