8026847: [TESTBUG] gc/g1/TestSummarizeRSetStats* tests launch 32bit jvm with UseCompressedOops

Summary: The test launched a 32 bit VM with UseCompressedOops enabled. This is not supported on 32 bit VMs, causing a test failure. Investigation showed that the use of this flag is not required at all, so simply remove it.
Reviewed-by: tschatzl, jwilhelm
Contributed-by: NAndrey Zakharov <andrey.x.zakharov@oracle.com>

test/gc/g1/TestSummarizeRSetStatsTools.java

@@ -88,7 +88,6 @@ public class TestSummarizeRSetStatsTools {
         ArrayList<String> finalargs = new ArrayList<String>();
         String[] defaultArgs = new String[] {
             "-XX:+UseG1GC",
-            "-XX:+UseCompressedOops",
             "-Xmn4m",
             "-Xmx20m",
             "-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking