reduce chatty-ness of test glue, esp for windows.
===VersionHistory:None===
Version history for 8.2.3 bugfixes #4579, #4548, #4582, #4559, and #4571
make nmi_tools test remote_task output more consistent, & batch_test output more clear.
===VersionHistory:None===
Merge branch 'V8_2-branch' into V8_3_1-branch
Merge branch 'V8_3_1-branch'