Merge

6330863: vm/gc/InfiniteList.java fails intermittently due to timeout Summary: in some cases, allocate from the old gen before doing a full gc Reviewed-by: stefank, jmasa

7146343: PS invoke methods should indicate the type of gc done Reviewed-by: stefank, jmasa

7132029: G1: mixed GC phase lasts for longer than it should Summary: Revamp of the mechanism that chooses old regions for inclusion in the CSet. It simplifies the code and introduces min and max bounds on the number of old regions added to the CSet at each mixed GC to avoid pathological cases. It also ensures that when we do a mixed GC we'll always find old regions to add to the CSet (i.e., it eliminates the case where a mixed GC will collect no old regions which can happen today). Reviewed-by: johnc, brutisso