Fix Gradle deprecation warnings

build.gradle

@@ -55,7 +55,8 @@ sonarqube {
 	}
 }
 
-task configDocsZip(dependsOn: [':docs:asciidoctor',':spring-session:javadoc']) << {
+task configDocsZip(dependsOn: [':docs:asciidoctor',':spring-session:javadoc']) {
+	doLast {
 		project.tasks.docsZip.from(project(':docs').asciidoctor) {
 			into('reference')
 		}
@@ -63,6 +64,7 @@ task configDocsZip(dependsOn: [':docs:asciidoctor',':spring-session:javadoc']) <
 			into('api')
 		}
 	}
+}
 
 
 task docsZip(type: Zip, dependsOn: 'configDocsZip') {

samples/httpsession-gemfire-boot/build.gradle

@@ -41,7 +41,8 @@ springBoot {
 	mainClass = 'sample.client.Application'
 }
 
-task runGemFireServer() << {
+task runGemFireServer() {
+	doLast {
 		println 'STARTING GEMFIRE SERVER...'
 
 		ext.port = reservePort()
@@ -61,6 +62,7 @@ task runGemFireServer() << {
 		process.out.close()
 		process.err.close()
 	}
+}
 
 
 integrationTest {

samples/httpsession-gemfire-clientserver-xml/build.gradle

@@ -27,13 +27,16 @@ mainClassName = 'sample.Application'
 def port
 def process
 
-task availablePort() << {
+task availablePort() {
+	doLast {
 		def serverSocket = new ServerSocket(0)
 		port = serverSocket.localPort
 		serverSocket.close()
 	}
+}
 
-task runGemFireServer(dependsOn: availablePort) << {
+task runGemFireServer(dependsOn: availablePort) {
+	doLast {
 		println 'STARTING GEMFIRE SERVER...'
 
 		String classpath = sourceSets.main.runtimeClasspath.collect { it }.join(File.pathSeparator)
@@ -51,6 +54,7 @@ task runGemFireServer(dependsOn: availablePort) << {
 		process.out.close()
 		process.err.close()
 	}
+}
 
 integrationTest.doLast {
 	println 'STOPPING GEMFIRE SERVER...'

samples/httpsession-gemfire-clientserver/build.gradle

@@ -28,13 +28,16 @@ def process
 
 mainClassName = "sample.ServerConfig"
 
-task availablePort() << {
+task availablePort() {
+	doLast {
 		def serverSocket = new ServerSocket(0)
 		port = serverSocket.localPort
 		serverSocket.close()
 	}
+}
 
-task runGemFireServer(dependsOn: availablePort) << {
+task runGemFireServer(dependsOn: availablePort) {
+	doLast {
 		println 'STARTING GEMFIRE SERVER...'
 
 		String classpath = sourceSets.main.runtimeClasspath.collect { it }.join(File.pathSeparator)
@@ -52,6 +55,7 @@ task runGemFireServer(dependsOn: availablePort) << {
 		process.out.close()
 		process.err.close()
 	}
+}
 
 integrationTest.doLast {
 	println 'STOPPING GEMFIRE SERVER...'