Add support to release Spring Data 3.0 using Java 17.

Closes #194

src/test/java/org/springframework/data/release/io/IoPropertiesUnitTests.java

@@ -1,74 +0,0 @@
-/*
- * Copyright 2020 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
- *
- *      https://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 org.springframework.data.release.io;
-
-import static org.assertj.core.api.Assertions.*;
-
-import java.io.File;
-import java.io.IOException;
-
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.io.TempDir;
-
-/**
- * @author Christoph Strobl
- */
-public class IoPropertiesUnitTests {
-
-	@TempDir File tempDir;
-	IoProperties properties;
-
-	@BeforeEach
-	void beforeEach() {
-		properties = new IoProperties();
-	}
-
-	@Test // GH-152
-	void setJavaHomeToDir() {
-
-		properties.setJavaHome(tempDir.getPath());
-
-		assertThat(properties.getJavaHome()).isNotNull().isDirectory();
-	}
-
-	@Test // GH-152
-	void setJavaHomeIgnoresEmptyString() {
-
-		properties.setJavaHome("");
-
-		assertThat(properties.getJavaHome()).isNull();
-	}
-
-	@Test // GH-152
-	void setJavaHomeIgnoresFile() throws IOException {
-
-		File f = new File(tempDir, "java.txt");
-		f.createNewFile();
-
-		properties.setJavaHome(f.getPath());
-
-		assertThat(properties.getJavaHome()).isNull();
-	}
-
-	@Test // GH-152
-	void setJavaHomeIgnoresDirectoryThatDoesNotExist() throws IOException {
-
-		properties.setJavaHome(new File(tempDir, "java-bin").getPath());
-
-		assertThat(properties.getJavaHome()).isNull();
-	}
-}