GF-12815: Replace ilib internal fucntion with ilib API
GF-12815: Replace ilib internal fucntion with ilib API

Previously, I use some internal data structure.
Those implementation is replaced with using ilib API accoring to Edwin's
guideline.

Enyo-DCO-1.1-Signed-off-by: David Um <david.um@lge.com>

mcanthony/moonstone,mcanthony/moonstone,mcanthony/moonstone,enyojs/moonstone