Validator: fix type for timestampMsTolerance to Long (#65)

Author: tarzanek

src/main/scala/com/scylladb/migrator/config/Validation.scala

@@ -8,7 +8,7 @@ case class Validation(compareTimestamps: Boolean,
                       writetimeToleranceMillis: Long,
                       failuresToFetch: Int,
                       floatingPointTolerance: Double,
-                      timestampMsTolerance: Double)
+                      timestampMsTolerance: Long)
 object Validation {
   implicit val encoder: Encoder[Validation] = deriveEncoder[Validation]
   implicit val decoder: Decoder[Validation] = deriveDecoder[Validation]

src/main/scala/com/scylladb/migrator/validation/RowComparisonFailure.scala

@@ -43,7 +43,7 @@ object RowComparisonFailure {
   def compareRows(left: CassandraRow,
                   right: Option[CassandraRow],
                   floatingPointTolerance: Double,
-                  timestampMsTolerance: Double,
+                  timestampMsTolerance: Long,
                   ttlToleranceMillis: Long,
                   writetimeToleranceMillis: Long,
                   compareTimestamps: Boolean): Option[RowComparisonFailure] =