[SPARK-12666][CORE] SparkSubmit packages fix for when 'default' conf doesn't...

[SPARK-12666][CORE] SparkSubmit packages fix for when 'default' conf doesn't exist in dependent module

## What changes were proposed in this pull request?

Adding a "(runtime)" to the dependency configuration will set a fallback configuration to be used if the requested one is not found.  E.g. with the setting "default(runtime)", Ivy will look for the conf "default" in the module ivy file and if not found will look for the conf "runtime".  This can help with the case when using "sbt publishLocal" which does not write a "default" conf in the published ivy.xml file.

## How was this patch tested?
used spark-submit with --packages option for a package published locally with no default conf, and a package resolved from Maven central.

Author: Bryan Cutler <cutlerb@gmail.com>

Closes #13428 from BryanCutler/fallback-package-conf-SPARK-12666.

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

@@ -897,9 +897,12 @@ private[spark] object SparkSubmitUtils {
     val localIvyRoot = new File(ivySettings.getDefaultIvyUserDir, "local")
     localIvy.setLocal(true)
     localIvy.setRepository(new FileRepository(localIvyRoot))
-    val ivyPattern = Seq("[organisation]", "[module]", "[revision]", "[type]s",
-      "[artifact](-[classifier]).[ext]").mkString(File.separator)
-    localIvy.addIvyPattern(localIvyRoot.getAbsolutePath + File.separator + ivyPattern)
+    val ivyPattern = Seq(localIvyRoot.getAbsolutePath, "[organisation]", "[module]", "[revision]",
+      "ivys", "ivy.xml").mkString(File.separator)
+    localIvy.addIvyPattern(ivyPattern)
+    val artifactPattern = Seq(localIvyRoot.getAbsolutePath, "[organisation]", "[module]",
+      "[revision]", "[type]s", "[artifact](-[classifier]).[ext]").mkString(File.separator)
+    localIvy.addArtifactPattern(artifactPattern)
     localIvy.setName("local-ivy-cache")
     cr.add(localIvy)
 
@@ -944,7 +947,7 @@ private[spark] object SparkSubmitUtils {
     artifacts.foreach { mvn =>
       val ri = ModuleRevisionId.newInstance(mvn.groupId, mvn.artifactId, mvn.version)
       val dd = new DefaultDependencyDescriptor(ri, false, false)
-      dd.addDependencyConfiguration(ivyConfName, ivyConfName)
+      dd.addDependencyConfiguration(ivyConfName, ivyConfName + "(runtime)")
       // scalastyle:off println
       printStream.println(s"${dd.getDependencyId} added as a dependency")
       // scalastyle:on println