added invoker param

src/main/scala/ScalaPetstoreCodegen.scala

@@ -21,7 +21,8 @@ import com.wordnik.swagger.core._
 object ScalaPetstoreCodegen extends BasicScalaGenerator {
   def main(args: Array[String]) = generateClient(args)
 
-  override def packageName = "com.wordnik.petstore"
+  // package for api invoker, error files
+  override def invokerPackage: Option[String] = Some("com.wordnik.client")
     
   // where to write generated code
   override def destinationDir = "samples/petstore/scala/src/main/scala"

src/main/scala/com/wordnik/swagger/codegen/BasicScalaGenerator.scala

@@ -39,6 +39,9 @@ class BasicScalaGenerator extends BasicGenerator {
     "double" -> "Double",
     "object" -> "Any")
     
+  // package for api invoker, error files
+  override def invokerPackage: Option[String] = Some("com.wordnik.client")
+    
   // template used for models
   modelTemplateFiles += "model.mustache" -> ".scala"
 

src/main/scala/com/wordnik/swagger/codegen/Codegen.scala

@@ -142,7 +142,7 @@ class Codegen(config: CodegenConfig) {
 
     val engine = engineData._1
     val template = engineData._2
-
+    
     var data = Map[String, AnyRef](
       "package" -> bundle("package"),
       "invokerPackage" -> bundle("invokerPackage"),