H2 tests may end up with an incorrect list of the standard DatabaseOb…

…ject types, so we need to reset the factory (#5899)

* H2 tests may end up with an incorrect list of the standard
DatabaseObject types, so we need to reset the factory

* Another comment

liquibase-integration-tests/src/test/java/liquibase/dbtest/h2/H2IntegrationTest.java

@@ -21,6 +21,7 @@
 import liquibase.executor.Executor;
 import liquibase.executor.ExecutorService;
 import liquibase.statement.core.RawSqlStatement;
+import liquibase.structure.core.DatabaseObjectFactory;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -41,6 +42,12 @@ public H2IntegrationTest() throws Exception {
         super("h2", DatabaseFactory.getInstance().getDatabase("h2"));
         this.changeSpecifyDbmsChangeLog = "changelogs/h2/complete/change.specify.dbms.changelog.xml";
         this.dbmsExcludeChangelog = "changelogs/h2/complete/dbms.exclude.changelog.xml";
+        //
+        // Reset the factory so that the standard types will be repopulated
+        // They might have been changed by a previous test.  Without the correct
+        // list of types, not all objects will be correctly dropped.
+        //
+        DatabaseObjectFactory.getInstance().reset();
     }
 
     @Test