fix flakey test by starting sql-reporter thread lazily
Merge pull request #267 from bukzor/fix-sql-retry-flake

Fix flakey test by starting sql-reporter thread lazily

The sql reporter test consistently flaked with:

    yes | xargs -P10 --replace sh -c 'testify test.plugins.sql_reporter_test RetryTestCase.test_can_fail; CODE=$?; echo $CODE; exit $?' |& egrep -v '^(PASSED|SQL connection|\.|0|.* 0 failed|$|\(Total test)'