Replace ExceptionRule with ExpectedException

This is in preparation for running the automatic refactoring script that
will replace all ExpectedExceptions with use of JUnit 4.13's assertThrows/
expectThrows.

Note that I have recorded the callsites of assertions about EppExceptions
being marshallable and will edit those specific assertions back in after
running the automatic refactoring script (which do not understand these).

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=178812403

javatests/google/registry/tmch/TmchXmlSignatureTest.java

@@ -21,7 +21,6 @@ import static google.registry.tmch.TmchTestData.loadSmd;
 
 import google.registry.config.RegistryConfig.ConfigModule.TmchCaMode;
 import google.registry.testing.AppEngineRule;
-import google.registry.testing.ExceptionRule;
 import google.registry.testing.FakeClock;
 import google.registry.testing.InjectRule;
 import google.registry.tmch.TmchXmlSignature.CertificateSignatureException;
@@ -33,6 +32,7 @@ import org.joda.time.DateTime;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.ExpectedException;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
@@ -50,7 +50,7 @@ public class TmchXmlSignatureTest {
       .build();
 
   @Rule
-  public final ExceptionRule thrown = new ExceptionRule();
+  public final ExpectedException thrown = ExpectedException.none();
 
   @Rule
   public final InjectRule inject = new InjectRule();