HPCC-11146 Clearing Error Log did not clear Error Count

Fixes HPCC-11146

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5646 from GordonSmith/HPCC-11146

HPCC-11146 Clearing Error Log did not clear Error Count

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>