Add hack for surefire

Author: cstamas

maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/resolution/TrustedChecksumsArtifactResolverPostProcessorTest.java

@@ -21,6 +21,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
@@ -73,6 +74,7 @@ public class TrustedChecksumsArtifactResolverPostProcessorTest implements Truste
 
     @Before
     public void prepareSubject() throws IOException {
+        Files.createDirectories(Paths.get(System.getProperty("java.io.tmpdir"))); // hack for Surefire
         // make the two artifacts, BOTH as resolved
         File tmp = Files.createTempFile("artifact", "tmp").toFile();
         artifactWithoutTrustedChecksum = new DefaultArtifact("test:test:1.0").setFile(tmp);