IndexMetaData.Builder.Index(String name) isn't renaming this.index

fixed elastic#2236.

Author: kimchy

src/main/java/org/elasticsearch/cluster/metadata/IndexMetaData.java

@@ -414,7 +414,7 @@ public String index() {
  return index;
  }
 
- public Builder index(String name) {
+ public Builder index(String index) {
  this.index = index;
  return this;
  }