ecore: fix that timers are not called in the order they were registered.

ecore: fix that timers are not called in the order they were registered.

Summary:
Timers are not called in the order they were registered.
Because when current timer is deleted, getting next timer is called twice.

Test Plan:
<error>
Timer1 expired after 0.001 seconds.
Timer3 expired after 0.001 seconds.
Timer5 expired after 0.001 seconds.
Timer7 expired after 0.001 seconds.
Timer2 expired after 0.001 seconds.
Timer6 expired after 0.001 seconds.
Timer4 expired after 0.001 seconds.
Timer8 expired after 0.001 seconds.
<correct>
Timer1 expired after 0.001 seconds.
Timer2 expired after 0.001 seconds.
Timer3 expired after 0.001 seconds.
Timer4 expired after 0.001 seconds.
Timer5 expired after 0.001 seconds.
Timer6 expired after 0.001 seconds.
Timer7 expired after 0.001 seconds.
Timer8 expired after 0.001 seconds.|

{F3268233}

Reviewers: Hermet, Jaehyun_Cho, zmike, SanghyeonLee

Reviewed By: zmike

Subscribers: cedric, #committers, zmike

Tags: #efl_tests

Differential Revision: https://phab.enlightenment.org/D6700