Prune dependencies and rename samples

spring-cloud-function-samples/function-sample/src/main/java/com/example/functions/Greeter.java

@@ -0,0 +1,30 @@
+/*
+ * 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.functions;
+
+import java.util.function.Function;
+
+/**
+ * @author Mark Fisher
+ */
+public class Greeter implements Function<String, String> {
+
+	@Override
+	public String apply(String name) {
+		return "Hello " + name;
+	}
+}