Improve cache clearing/GC/heap dump behavior#2986

labkey-jeckels wants to merge 3 commits intorelease26.3-SNAPSHOTLabKey/testAutomation:release26.3-SNAPSHOTfrom

26.3_fb_adminConsoleCleanupLabKey/testAutomation:26.3_fb_adminConsoleCleanupCopy head branch name to clipboard