[SPARK-23941][MESOS] Mesos task failed on specific spark app name

## What changes were proposed in this pull request?
Shell escaped the name passed to spark-submit and change how conf attributes are shell escaped.

## How was this patch tested?
This test has been tested manually with Hive-on-spark with mesos or with the use case described in the issue with the sparkPi application with a custom name which contains illegal shell characters.

With this PR, hive-on-spark on mesos works like a charm with hive 3.0.0-SNAPSHOT.

I state that this contribution is my original work and that I license the work to the project under the project’s open source license

Author: Bounkong Khamphousone <[email protected]>

Closes apache#21014 from tiboun/fix/SPARK-23941.

(cherry picked from commit 6782359)
Signed-off-by: Marcelo Vanzin <[email protected]>

resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosClusterScheduler.scala

@@ -485,9 +485,9 @@ private[spark] class MesosClusterScheduler(
       .filter { case (key, _) => !replicatedOptionsBlacklist.contains(key) }
       .toMap
     (defaultConf ++ driverConf).foreach { case (key, value) =>
-      options ++= Seq("--conf", s""""$key=${shellEscape(value)}"""".stripMargin) }
+      options ++= Seq("--conf", s"${key}=${value}") }
 
-    options
+    options.map(shellEscape)
   }
 
   /**