Fix some issues caught by IntelliJ static code analysis

The most common issues were:
* Arrays.asList() shouldn't be called with a single parameter.
* Broken Javadoc @links.
* Unnecessary casts and type declarations.
* Unnecessary unused variable initializations.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=230994311

java/google/registry/dns/DnsQueue.java

@@ -61,7 +61,7 @@ import org.joda.time.Duration;
  * {@link ReadDnsQueueAction}, which is run as a cron job with running time shorter than the cron
  * repeat time - meaning there should never be two instances running at once.
  *
- * @see google.registry.config.RegistryConfig#provideReadDnsQueueRuntime
+ * @see google.registry.config.RegistryConfig.ConfigModule#provideReadDnsQueueRuntime
  */
 public class DnsQueue {