Add maxHeapSize back in

Signed-off-by: Craig Perkins <cwperx@amazon.com>

build.gradle

@@ -569,6 +569,11 @@ task integrationTest(type: Test) {
     }
 }
 
+tasks.named("integrationTest") {
+    minHeapSize = "512m"
+    maxHeapSize = "2g"
+}
+
 tasks.integrationTest.finalizedBy(jacocoTestReport) // report is always generated after integration tests run
 
 //run the integrationTest task before the check task