Clean up after our enum key testing, use trueLiteral().

src/test/java/com/samskivert/depot/KeyTest.java

@@ -81,6 +81,8 @@ public class KeyTest extends TestBase
         assertEquals(4, _repo.loadEnums(EnumSet.allOf(EnumKeyRecord.Type.class)).size());
 
         assertEquals("beee", _repo.loadEnum(EnumKeyRecord.Type.B).name);
+
+        _repo.from(EnumKeyRecord.class).where(Exps.trueLiteral()).delete();
     }
 
     // the HSQL in-memory database persists for the lifetime of the VM, which means we have to

src/test/java/com/samskivert/depot/QueryTest.java

@@ -82,7 +82,7 @@ public class QueryTest extends TestBase
         _repo.deleteAll(TestRecord.class, new Where(TestRecord.RECORD_ID.lessEq(CREATE_RECORDS/2)));
         assertEquals(CREATE_RECORDS/2, _repo.findAll(TestRecord.class).size());
 
-        _repo.deleteAll(TestRecord.class, new Where(Exps.literal("true")));
+        _repo.deleteAll(TestRecord.class, new Where(Exps.trueLiteral()));
         assertEquals(0, _repo.findAll(TestRecord.class).size());
 
 //         // TODO: try to break our In() clause