Add 'test' and 'integrationTest' closures to configure the test JVM Heap memory sizes using Gradle Project Properties.

Additionally, add JVM System Property and Gradle Project Property support to configure the Apache Geode Logback Logger log-level.

spring-session-data-geode/spring-session-data-geode.gradle

@@ -38,3 +38,33 @@ dependencies {
 	integrationTestRuntime "org.springframework.shell:spring-shell"
 
 }
+
+test {
+
+	maxHeapSize = project.hasProperty("test.jvm.heap.max-size")
+		? project.getProperty("test.jvm.heap.max-size")
+		: "512m"
+
+	minHeapSize = project.hasProperty("test.jvm.heap.min-size")
+		? project.getProperty("test.jvm.heap.min-size")
+		: "512m"
+
+}
+
+integrationTest {
+
+	maxHeapSize = project.hasProperty("test.jvm.heap.max-size")
+		? project.getProperty("test.jvm.heap.max-size")
+		: "2g"
+
+	minHeapSize = project.hasProperty("test.jvm.heap.min-size")
+		? project.getProperty("test.jvm.heap.min-size")
+		: "512m"
+
+	def gradleProjectPropertyLogbackLogLevel = project.hasProperty("logback.log.level")
+		? project.getProperty("logback.log.level")
+		: "ERROR";
+
+	systemProperty "logback.log.level", System.getProperty("logback.log.level", gradleProjectPropertyLogbackLogLevel)
+
+}