AggregatePolicyProvider policy = new AggregatePolicyProvider();
checkPolicy0Permissions(policy);
thr.setContextClassLoader(ldr1);
checkPolicy0Permissions(policy);
System.setProperty("java.security.policy", policy1File);
policy.refresh();
checkPolicy1Permissions(policy);
thr.setContextClassLoader(null);
policy.setPolicy(null, new PolicyFileProvider(policy0File));
policy.setPolicy(ldr1,