hg: jdk/sandbox: 8215727: Restore JFR thread sampler loop to old / previous behavior

[chris.hegarty at oracle.com]

Changeset: 58154bf80f90
Author:    mgronlun
Date:      2018-12-21 16:56 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/58154bf80f90

8215727: Restore JFR thread sampler loop to old / previous behavior
Reviewed-by: egahlin, mgronlun
Contributed-by: milan.mimica at gmail.com

! src/hotspot/share/jfr/periodic/sampling/jfrThreadSampler.cpp