PROC-148: Fix AbstractProctorLoader always reloading matrix.

The audit version changed from an int to a String, so the new
test matrix comparison should use equals() instead of ==.

This is the only equality check I could find for audit version
in the codebase.
Merge branch 'PROC-148-fixauditversioncompare' into 'master'

Proc 148 fixauditversioncompare

See merge request !8