Fix incorrect cache memory information

Author: Tim Middleton (Software Engineer)

coherence-visualvm-plugin/src/main/java/com/oracle/coherence/plugin/visualvm/tablemodel/model/CacheData.java

@@ -310,7 +310,7 @@ public SortedMap<Object, Data> getAggregatedDataFromHttpQuerying(VisualVMModel m
 
                         data.setColumn(UNIT_CALCULATOR, sUnitCalculator);
                         long cMemoryUsageBytes = Long.parseLong(getFirstMemberOfArray(cacheDetails, "unitFactor"))
-                                            * cacheDetails.get("units").asInt();
+                                            * cacheDetails.get("units").asLong();
                         data.setColumn(MEMORY_USAGE_BYTES, cMemoryUsageBytes);
                         data.setColumn(MEMORY_USAGE_MB, (int) (cMemoryUsageBytes / 1024 / 1024));