add task sample

spring-cloud-function-samples/spring-cloud-function-sample-task/src/main/java/com/example/SampleApplication.java

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+/*
+ * Copyright 2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SampleApplication {
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleApplication.class, args);
+	}
+}

spring-cloud-function-samples/spring-cloud-function-sample-task/src/main/resources/application.yml

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+spring:
+  cloud:
+    function:
+      task:
+        supplier: words
+        function: uppercase
+        consumer: print        
+      compile:
+        words:
+          type: supplier
+          lambda: ()->Flux.just("hello","world")
+        uppercase:
+          lambda: s->s.toUpperCase()
+          inputType: String
+          outputType: String
+        print:
+          type: consumer
+          lambda: System.out::println