Test large files with CI

Author: Torch3333

core/build.gradle

@@ -208,6 +208,7 @@ task integrationTestCassandra(type: Test) {
     options {
         systemProperties(System.getProperties().findAll{it.key.toString().startsWith("scalardb")})
     }
+    maxHeapSize = "4g"
 }
 
 task integrationTestCosmos(type: Test) {
@@ -237,6 +238,7 @@ task integrationTestDynamo(type: Test) {
     options {
         systemProperties(System.getProperties().findAll{it.key.toString().startsWith("scalardb")})
     }
+    maxHeapSize = "4g"
     maxParallelForks = 10
 }
 
@@ -249,6 +251,7 @@ task integrationTestJdbc(type: Test) {
     options {
         systemProperties(System.getProperties().findAll{it.key.toString().startsWith("scalardb")})
     }
+    maxHeapSize = "4g" // maximum heap size
 }
 
 task integrationTestMultiStorage(type: Test) {