Failed to load com.databricks.spark.csv while running with spark-submit

I am trying to run my code with spark-submit with the below command.

spark-submit --class "SampleApp" --master local[2] target/scala-2.11/sample-project_2.11-1.0.jar

And my sbt file is having below dependencies:

libraryDependencies += "org.apache.spark" %% "spark-core" % "1.4.1"

libraryDependencies += "org.apache.spark" % "spark-sql_2.11" % "1.5.2"

libraryDependencies += "com.databricks" % "spark-csv_2.11" % "1.2.0"

My code :

import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.spark.SparkConf
import scala.collection.mutable.ArrayBuffer 
import org.apache.spark.sql.SQLContext

object SampleApp {
  def main(args: Array[String]) {
    val conf = new SparkConf().setAppName("Sample App").setMaster("local[2]")
    val sc = new SparkContext(conf)
    val sqlContext = new SQLContext(sc) 

    import sqlContext._ 
    import sqlContext.implicits._

    val df = sqlContext.load("com.databricks.spark.csv", Map("path" -> "/root/input/Account.csv", "header" -> "true"))

    val column_names = df.columns
    val row_count = df.count
    val column_count = column_names.length

    var pKeys = ArrayBuffer[String]()

    for ( i <- column_names){
         if (row_count == df.groupBy(i).count.count){
             pKeys += df.groupBy(i).count.columns(0)
         }
     }

    pKeys.foreach(print)
  }
}

The error:

16/03/11 04:47:37 INFO BlockManagerMaster: Registered BlockManager
Exception in thread "main" java.lang.RuntimeException: Failed to load class for data source: com.databricks.spark.csv
    at scala.sys.package$.error(package.scala:27)
    at org.apache.spark.sql.sources.ResolvedDataSource$.lookupDataSource(ddl.scala:220)
    at org.apache.spark.sql.sources.ResolvedDataSource$.apply(ddl.scala:233)
    at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:114)
    at org.apache.spark.sql.SQLContext.load(SQLContext.scala:1253)

My Spark Version is 1.4.1 and Scala is 2.11.7

(I am following this link: http://www.nodalpoint.com/development-and-deployment-of-spark-applications-with-scala-eclipse-and-sbt-part-1-installation-configuration/)

I have tried below versions of spark csv

spark-csv_2.10 1.2.0
1.4.0 
1.3.1
1.3.0
1.2.0
1.1.0
1.0.3
1.0.2
1.0.1
1.0.0

etc.

Please help!