Replace datetime.utcnow with timeutils.utcnow
Replace datetime.utcnow with timeutils.utcnow

Fixes bug #1008064

Replaced datetime.utcnow usage with timeutils.utcnow

Change-Id: I8bfdc1abefc3891497554335a3078d4028ef8ac9

JioCloud/oslo-incubator,JioCloud/oslo-incubator,JioCloud/oslo-incubator