[SPARK-15387][SQL] SessionCatalog in SimpleAnalyzer does not need to make database directory.

## What changes were proposed in this pull request?

After #12871 is fixed, we are forced to make `/user/hive/warehouse` when SimpleAnalyzer is used but SimpleAnalyzer may not need the directory.

## How was this patch tested?

Manual test.

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #13175 from sarutak/SPARK-15387.

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala

@@ -22,7 +22,7 @@ import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.{CatalystConf, ScalaReflection, SimpleCatalystConf}
-import org.apache.spark.sql.catalyst.catalog.{CatalogRelation, InMemoryCatalog, SessionCatalog}
+import org.apache.spark.sql.catalyst.catalog.{CatalogDatabase, CatalogRelation, InMemoryCatalog, SessionCatalog}
 import org.apache.spark.sql.catalyst.encoders.OuterScopes
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
@@ -45,7 +45,9 @@ object SimpleAnalyzer extends Analyzer(
     new SessionCatalog(
       new InMemoryCatalog,
       EmptyFunctionRegistry,
-      new SimpleCatalystConf(caseSensitiveAnalysis = true)),
+      new SimpleCatalystConf(caseSensitiveAnalysis = true)) {
+      override def createDatabase(dbDefinition: CatalogDatabase, ignoreIfExists: Boolean) {}
+    },
     new SimpleCatalystConf(caseSensitiveAnalysis = true))
 
 /**