8185112: [TESTBUG] Serviceability tests cannot parse float if non US locale.
Reviewed-by: simonis, goetz, dholmes
Contributed-by: Arno Zeller <arno.zeller@sap.com>

8170737: Not enough old space utilisation
Reviewed-by: dfazunen, tschatzl

8130063: Refactoring tmtools jstat and jstack tests to jtreg
Summary: Some of the jstat and jstack tests refactored to be run with the jtreg
Reviewed-by: jbachorik