Fixed implicit override

Author: gakuzzzz

play2-oauth2-provider/src/main/scala/scalaoauth2/provider/OAuth2ProviderActionBuilders.scala

@@ -15,5 +15,5 @@ trait OAuth2ProviderActionBuilders {
 }
 
 object OAuth2ProviderActionBuilders extends OAuth2ProviderActionBuilders {
-  val executionContext: ExecutionContext = play.api.libs.concurrent.Execution.defaultContext
+  implicit val executionContext: ExecutionContext = play.api.libs.concurrent.Execution.defaultContext
 }

play2-oauth2-provider/src/test/scala/scalaoauth2/provider/OAuth2ProviderActionBuildersSpec.scala

@@ -10,7 +10,6 @@ import play.api.mvc.Results._
 class OAuth2ProviderActionBuildersSpec extends FlatSpec {
 
   import OAuth2ProviderActionBuilders._
-  import scala.concurrent.ExecutionContext.Implicits.global
 
   val action = AuthorizedAction(new MockDataHandler) { request =>
     Ok(request.authInfo.user.name)