RFR: Remove 5 develop options from GC code.

[David Lindholm]

Hi,

Please review this patch that removes the following 5 develop options 
from the GC code:

ScavengeWithObjectsInToSpace
ParallelOldGCSplitALot
ParallelOldGCSplitInterval
PSAdjustTenuredGenForMinorPause
PSAdjustYoungGenForMajorPause

Bug: https://bugs.openjdk.java.net/browse/JDK-8139277   which is a 
subtask to
Bug: https://bugs.openjdk.java.net/browse/JDK-8139276
Webrev: http://cr.openjdk.java.net/~david/JDK-8139277/webrev.00/

Testing: Passed JPRT


Thanks,
David