[SPARK-22849] ivy.retrieve pattern should also consider classifier

## What changes were proposed in this pull request?
In the previous PR #5755 (comment), we dropped `(-[classifier])` from the retrieval pattern. We should add it back; otherwise,
> If this pattern for instance doesn't has the [type] or [classifier] token, Ivy will download the source/javadoc artifacts to the same file as the regular jar.

## How was this patch tested?
The existing tests

Author: gatorsmile <[email protected]>

Closes #20037 from gatorsmile/addClassifier.

Author: gatorsmile

core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala

@@ -1271,7 +1271,7 @@ private[spark] object SparkSubmitUtils {
         // retrieve all resolved dependencies
         ivy.retrieve(rr.getModuleDescriptor.getModuleRevisionId,
           packagesDirectory.getAbsolutePath + File.separator +
-            "[organization]_[artifact]-[revision].[ext]",
+            "[organization]_[artifact]-[revision](-[classifier]).[ext]",
           retrieveOptions.setConfs(Array(ivyConfName)))
         resolveDependencyPaths(rr.getArtifacts.toArray, packagesDirectory)
       } finally {