Prevent a possible divide by 0 in obj/auditor.py.
Prevent a possible divide by 0 in obj/auditor.py.

Fixes bug 941731. If 'elapsed=0' in audit_all_objects set it
to 0.000001 to avoid divide by 0.

Change-Id: If0b43568033167818c482c8927863bea1dccfe57

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