Reorganize log message patterns in testsuite

Reorganize log message patterns in testsuite

This groups the message patterns by processing phase.

Prior to committing, this was validated with:
    (DIFF='git diff --cached';
     comm -3 <($DIFF | grep ^- | sed -e 's/^-//' | sort) \
             <($DIFF | grep ^+ | sed -e 's/^+//' | sort) )

The output shows only a blank line and diff headers.  To replicate, change
the "git diff" command to compare this commit with its parent.