RFR(XS) JDK-8024646: Remove LRG_List container, replace it with GrowableArray

[Niclas Adlertz]

Hi all,

While working on 8022783, I've found that LRG_List can be removed.
LRG_List is just another growable array, so we can replace it with the more common implementation named class GrowableArray.

A review would be much appreciated.

WEBREV: http://cr.openjdk.java.net/~adlertz/JDK-8024646/webrev00/
JBS: https://bugs.openjdk.java.net/browse/JDK-8024646

Kind Regards,
Niclas Adlertz