8208186: SetHeapSamplingInterval handles 1 explicitly
Summary: Explicitly test for the 0 case (sample everything)
Reviewed-by: amenkov, sspitsyn
^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
\.DS_Store
\.metadata/
\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
.*/JTreport/.*
.*/JTwork/.*
.*/.git/.*