Revert "Removed the compilation timeout"

This reverts commit f290b58b.

mjtest/test/exec_tests.py

@@ -120,7 +120,7 @@ class JavaExecTest(BasicSyntaxTest):
         try:
             out, err, rtcode = None, None, None
             try:
-                out, err, rtcode = self.env.run_mj_command(self.MODE, base_filename + ".java", timeout=-1)
+                out, err, rtcode = self.env.run_mj_command(self.MODE, base_filename + ".java", timeout=timeout)
                 if rtcode != 0:
                     test_result.incorrect_msg = "file can't be compiled"
                     test_result.set_error_code(rtcode)