Fixes spelling typo in trait name "CreateableRelationProvider"

Author: liancheng

sql/core/src/main/scala/org/apache/spark/sql/json/JSONRelation.scala

@@ -27,7 +27,7 @@ import org.apache.spark.sql.types.StructType
 
 
 private[sql] class DefaultSource
-  extends RelationProvider with SchemaRelationProvider with CreateableRelationProvider {
+  extends RelationProvider with SchemaRelationProvider with CreatableRelationProvider {
 
   /** Returns a new base relation with the parameters. */
   override def createRelation(

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

@@ -279,9 +279,9 @@ object ResolvedDataSource {
     }
 
     val relation = clazz.newInstance match {
-      case dataSource: org.apache.spark.sql.sources.CreateableRelationProvider =>
+      case dataSource: org.apache.spark.sql.sources.CreatableRelationProvider =>
         dataSource
-          .asInstanceOf[org.apache.spark.sql.sources.CreateableRelationProvider]
+          .asInstanceOf[org.apache.spark.sql.sources.CreatableRelationProvider]
           .createRelation(sqlContext, options, data)
       case _ =>
         sys.error(s"${clazz.getCanonicalName} does not allow create table as select.")
@@ -366,7 +366,7 @@ private [sql] case class CreateTempTableUsingAsSelect(
 /**
  * Builds a map in which keys are case insensitive
  */
-protected class CaseInsensitiveMap(map: Map[String, String]) extends Map[String, String] 
+protected class CaseInsensitiveMap(map: Map[String, String]) extends Map[String, String]
   with Serializable {
 
   val baseMap = map.map(kv => kv.copy(_1 = kv._1.toLowerCase))

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

@@ -78,7 +78,7 @@ trait SchemaRelationProvider {
 }
 
 @DeveloperApi
-trait CreateableRelationProvider {
+trait CreatableRelationProvider {
   def createRelation(
       sqlContext: SQLContext,
       parameters: Map[String, String],