Fix intermittent rsylog memory test failures.
Fix intermittent rsylog memory test failures.

Hopefully this will finally settle this test for good, since rarely the
memory growth is reported upwards of 12000kb. So change some things
around, and check the overall memory of the process at the start to try
and better test for this when running in the full suite.

NREL/api-umbrella,NREL/api-umbrella,NREL/api-umbrella,NREL/api-umbrella