[SPARK-6633][SQL] Should be "Contains" instead of "EndsWith" when constructing...

[SPARK-6633][SQL] Should be "Contains" instead of "EndsWith" when constructing sources.StringContains

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #5299 from viirya/stringcontains and squashes the following commits:

c1ece4c [Liang-Chi Hsieh] Should be Contains instead of EndsWith.

sql/core/src/main/scala/org/apache/spark/sql/sources/DataSourceStrategy.scala

@@ -173,7 +173,7 @@ private[sql] object DataSourceStrategy extends Strategy {
       case expressions.EndsWith(a: Attribute, Literal(v: String, StringType)) =>
         Some(sources.StringEndsWith(a.name, v))
 
-      case expressions.EndsWith(a: Attribute, Literal(v: String, StringType)) =>
+      case expressions.Contains(a: Attribute, Literal(v: String, StringType)) =>
         Some(sources.StringContains(a.name, v))
 
       case _ => None