Revert "Merge pull request #94 from aarondav/mesos-fix"

This reverts commit fe974ba.

The commit only applies to 0.9, not 0.8.x.

Author: rxin

core/src/main/scala/org/apache/spark/SparkContext.scala

@@ -156,8 +156,8 @@ class SparkContext(
     val LOCAL_CLUSTER_REGEX = """local-cluster\[\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*]""".r
     // Regular expression for connecting to Spark deploy clusters
     val SPARK_REGEX = """spark://(.*)""".r
-    // Regular expression for connection to Mesos cluster
-    val MESOS_REGEX = """mesos://(.*)""".r
+    //Regular expression for connection to Mesos cluster
+    val MESOS_REGEX = """(mesos://.*)""".r
 
     master match {
       case "local" =>