Format some imports using fix_imports.py

Unfortunately this tool isn't smart enough to deal with the assertThat
situation (which has two static imports of a function with the same name).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172000753

java/google/registry/model/ofy/OfyFilter.java

@@ -14,7 +14,6 @@
 
 package google.registry.model.ofy;
 
-
 import java.io.IOException;
 import javax.servlet.Filter;
 import javax.servlet.FilterChain;