Always clear ofy session cache in command tests

The previous code would not execute after failure tests that ended
with thrown exceptions, potentially causing issues with post-run
verification inside of tests.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=117484219

javatests/com/google/domain/registry/tools/CommandTestCase.java

@@ -76,14 +76,17 @@ public abstract class CommandTestCase<C extends Command> {
 
   void runCommand(String... args) throws Exception {
     RegistryToolEnvironment.UNITTEST.setup();
+    try {
       JCommander jcommander = new JCommander(command);
       jcommander.addConverterFactory(new ParameterFactory());
       jcommander.parse(args);
       command.run();
+    } finally {
       // Clear the session cache so that subsequent reads for verification purposes hit datastore.
       // This primarily matters for AutoTimestamp fields, which otherwise won't have updated values.
       ofy().clearSessionCache();
     }
+  }
 
   /** Adds "--force" as the first parameter, then runs the command. */
   void runCommandForced(String... args) throws Exception {