util: replace file() with open()
util: replace file() with open()

Change-Id: I5d9f092a46f61af4569fb021f127f4bfb3db3a58
(cherry picked from commit 052dfb1d34058240a4853d2c1399abc18c7ce2bd)

intelxed/mbuild,intelxed/mbuild,intelxed/mbuild