RFR (S): 8176885: Clear Claimed Marks log message at wrong location in the log

[Thomas Schatzl]

Hi all,

  can I have quick reviews for this change to the order of the "Clear
Claimed Marks" log message?

Two issues: it's at the wrong location, printed in the "Post Evacuate
Collection Set" section as it is executed during the "Evacuate
Collection Set" phase, and in the middle of the "(Parallel) Redirty"
log output.

Second, this task should actually be part of the "Pre Evacuate
Collection Set" phase, as the "Evacuate Collection Set" phase should
only contain the bare (parallel) evacuation itself.

I moved the log message and the actual code to the "pre evacuate
collection set" phase.

CR:
https://bugs.openjdk.java.net/browse/JDK-8176885
Webrev:
http://cr.openjdk.java.net/~tschatzl/8176885/webrev/
Testing:
local testing, inspecting log

Thanks,
  Thomas