[HOTFIX] Fix the maven build after adding sqlContext to spark-shell

Follow up to #4387 to fix the build break.

Author: Michael Armbrust <michael@databricks.com>

Closes #4443 from marmbrus/fixMaven and squashes the following commits:

1eeba7d [Michael Armbrust] try again
7f5fb15 [Michael Armbrust] [HOTFIX] Fix the maven build after adding sqlContext to spark-shell

repl/pom.xml

@@ -66,7 +66,6 @@
       <groupId>org.apache.spark</groupId>
       <artifactId>spark-sql_${scala.binary.version}</artifactId>
       <version>${project.version}</version>
-      <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.scala-lang</groupId>