Fix test on Windows

Author: smowton

java/ql/integration-tests/java/maven-download-failure/test.py

@@ -3,8 +3,12 @@
 import shutil
 
 def test(codeql, java, check_diagnostics):
+
+    # Avoid shutil resolving mvn to the wrapper script in the test dir:
+    os.environ["NoDefaultCurrentDirectoryInExePath"] = "0"
     runenv = {
         "PATH": os.path.realpath(os.path.dirname(__file__)) + os.pathsep + os.getenv("PATH"),
         "REAL_MVN_PATH": shutil.which("mvn"),
     }
+    del os.environ["NoDefaultCurrentDirectoryInExePath"]
     codeql.database.create(build_mode = "none", _env = runenv)