Add maven package in stdlib

Signed-off-by: Alvise <vitalvise@gmail.com>

stdlib/java/maven/tests/testdata/src/main/java/io/dagger/maven/springboottest/SpringBootTestApplication.java

@@ -0,0 +1,13 @@
+package io.dagger.maven.springboottest;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootTestApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringBootTestApplication.class, args);
+	}
+
+}

stdlib/java/maven/tests/testdata/src/main/resources/application.properties

@@ -0,0 +1 @@
+

stdlib/java/maven/tests/testdata/src/test/java/io/dagger/maven/springboottest/SpringBootTestApplicationTests.java

@@ -0,0 +1,13 @@
+package io.dagger.maven.springboottest;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringBootTestApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}