zeppelin-spark_2.10 on maven central is not compiled based on scala-2.10

zeppelin-spark_2.10 artifcat on maven central is not compiled based on scala-2.10.

So the artifact get from the below command is not of scala-2.10.

./bin/install-interpreter.sh —name spark —artifact org.apache.zeppelin:zeppelin-spark_2.10:0.7.1.

The maven link is https://mvnrepository.com/artifact/org.apache.zeppelin/zeppelin-spark_2.10/0.7.1.

If you decompile the class ZeppelinRDisplay.class on the artifact and check the htmlDisplay
method

```scala
private RDisplay htmlDisplay(Element body, String imageWidth)
{
ObjectRef div = ObjectRef.create(new String());

JavaConversions..MODULE$.asScalaBuffer(body.children()).foreach(new AbstractFunction1()
{
public static final long serialVersionUID = 0L;

public final void apply(Element element)
{
String eHtml = element.html();
String eOuterHtml = element.outerHtml();

eOuterHtml = eOuterHtml.replace("“%html

```
You can see it calls ObjectRef.create which method is from scala 2.11 not scala 2.10.

This problem will influence those who use R with spark_2.10.