[SPARK-22637][SQL] Only refresh a logical plan once.

## What changes were proposed in this pull request?
`CatalogImpl.refreshTable` uses `foreach(..)` to refresh all tables in a view. This traverses all nodes in the subtree and calls `LogicalPlan.refresh()` on these nodes. However `LogicalPlan.refresh()` is also refreshing its children, as a result refreshing a large view can be quite expensive.

This PR just calls `LogicalPlan.refresh()` on the top node.

## How was this patch tested?
Existing tests.

Author: Herman van Hovell <hvanhovell@databricks.com>

Closes #19837 from hvanhovell/SPARK-22637.

sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala

@@ -480,7 +480,7 @@ class CatalogImpl(sparkSession: SparkSession) extends Catalog {
     if (tableMetadata.tableType == CatalogTableType.VIEW) {
       // Temp or persistent views: refresh (or invalidate) any metadata/data cached
       // in the plan recursively.
-      table.queryExecution.analyzed.foreach(_.refresh())
+      table.queryExecution.analyzed.refresh()
     } else {
       // Non-temp tables: refresh the metadata cache.
       sessionCatalog.refreshTable(tableIdent)