Ensure local repository cache is always used

spring-boot-cli/src/test/java/org/springframework/boot/cli/CliTester.java

@@ -88,8 +88,14 @@ public class CliTester implements TestRule {
 		return Executors.newSingleThreadExecutor().submit(new Callable<T>() {
 			@Override
 			public T call() throws Exception {
-				command.run(sources);
-				return command;
+				ClassLoader loader = Thread.currentThread().getContextClassLoader();
+				try {
+					command.run(sources);
+					return command;
+				}
+				finally {
+					Thread.currentThread().setContextClassLoader(loader);
+				}
 			}
 		});
 	}

spring-boot-cli/src/test/java/org/springframework/boot/cli/GrabCommandIntegrationTests.java

@@ -54,9 +54,8 @@ public class GrabCommandIntegrationTests {
 
 		// Use --autoconfigure=false to limit the amount of downloaded dependencies
 		String output = this.cli.grab("grab.groovy", "--autoconfigure=false");
-		assertTrue(output.contains("Downloading: file:"));
 		assertTrue(new File("target/repository/net/sf/jopt-simple/jopt-simple")
 				.isDirectory());
-
+		assertTrue(output.contains("Downloading: file:"));
 	}
 }

spring-boot-cli/src/test/java/org/springframework/boot/cli/SpringCliTests.java

@@ -20,6 +20,7 @@ import java.util.Arrays;
 import java.util.EnumSet;
 import java.util.Set;
 
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -60,8 +61,16 @@ public class SpringCliTests {
 
 	private Set<Call> calls = EnumSet.noneOf(Call.class);
 
+	private ClassLoader loader;
+
+	@After
+	public void close() {
+		Thread.currentThread().setContextClassLoader(this.loader);
+	}
+
 	@Before
 	public void setup() {
+		this.loader = Thread.currentThread().getContextClassLoader();
 		MockitoAnnotations.initMocks(this);
 		this.cli = new SpringCli() {