RFR: JDK-8150068: Log the main G1 phases at info level

[Thomas Schatzl]

Hi Bengt,

On Fri, 2016-02-26 at 15:15 +0100, Bengt Rutisson wrote:
> Here's an updated webrev that is based on top of Thomas recent
> changes 
> for JDK-8150630, JDK-8076463, JDK-8150629 and JDK-8140777:
> 
> http://cr.openjdk.java.net/~brutisso/8150068/webrev.02/
> 
> I had to do some manual merging so unfortunately it is not easy to 
> provide a diff compared to the last version. All merging was in 
> g1GCPhaseTimes.cpp and they were due to the addition of
> PreserveCMReferents.

  looks good.

Thomas