Merge

8033426: Scale initial NewSize using NewRatio if not set on command line Summary: Now using NewRatio to size initial NewSize if not specified on commandline. Reviewed-by: jmasa, jwilhelm

8026849: Fix typos in the GC code, part 2 Summary: Fixed typos in assert messages, flag descriptions and verbose messages Reviewed-by: stefank, tschatzl

8033923: Use BufferingOopClosure for G1 code root scanning Reviewed-by: mgerdin, brutisso