Prefer delayed %r formatting over explicit repr use

This change replaces the pattern like:

  LOG.info(_LI("...: %s"), repr(var))

by:

  LOG.info(_LI("...: %r"), var)

Change-Id: I756ddaa259e55a22e010276c65d797d3c51b4a61
Merge "Prefer delayed %r formatting over explicit repr use"