Upgrade Hazelcast 4 to 4.2

Closes gh-1821

Author: eleftherias

spring-session-hazelcast/hazelcast4/hazelcast4.gradle

@@ -31,7 +31,7 @@ artifacts {
 
 dependencies {
     compile project(':spring-session-core')
-    optional "com.hazelcast:hazelcast:4.1.1"
+    optional "com.hazelcast:hazelcast:4.2"
     compile "org.springframework:spring-context"
     compile "javax.annotation:javax.annotation-api"
 
@@ -42,7 +42,7 @@ dependencies {
     testRuntime "org.junit.jupiter:junit-jupiter-engine"
 
     integrationTestCompile "org.testcontainers:testcontainers"
-    integrationTestCompile "com.hazelcast:hazelcast:4.1.1"
+    integrationTestCompile "com.hazelcast:hazelcast:4.2"
     integrationTestCompile project(":spring-session-hazelcast")
 }
 

spring-session-hazelcast/hazelcast4/src/integration-test/java/org/springframework/session/hazelcast/ClientServerHazelcast4IndexedSessionRepositoryITests.java

@@ -45,8 +45,8 @@
 @WebAppConfiguration
 class ClientServerHazelcast4IndexedSessionRepositoryITests extends AbstractHazelcast4IndexedSessionRepositoryITests {
 
-	private static GenericContainer container = new GenericContainer<>("hazelcast/hazelcast:4.1.1")
-			.withExposedPorts(5701).withCopyFileToContainer(MountableFile.forClasspathResource("/hazelcast-server.xml"),
+	private static GenericContainer container = new GenericContainer<>("hazelcast/hazelcast:4.2").withExposedPorts(5701)
+			.withCopyFileToContainer(MountableFile.forClasspathResource("/hazelcast-server.xml"),
 					"/opt/hazelcast/hazelcast.xml");
 
 	@BeforeAll

spring-session-samples/spring-session-sample-boot-hazelcast4/spring-session-sample-boot-hazelcast4.gradle

@@ -6,7 +6,7 @@ dependencies {
     compile "org.springframework.boot:spring-boot-starter-web"
     compile "org.springframework.boot:spring-boot-starter-thymeleaf"
     compile "org.springframework.boot:spring-boot-starter-security"
-    compile "com.hazelcast:hazelcast:4.1.1"
+    compile "com.hazelcast:hazelcast:4.2"
     compile "nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect"
     compile "org.webjars:bootstrap"
     compile "org.webjars:html5shiv"