aetest: appYAMLTemplate should use runtime: go111 (#214)

* Fix runtime to appYAMLTemplate

* Remove api_version to appYAMLTemplate

aetest/instance_vm.go

diff --git a/aetest/instance_vm.go b/aetest/instance_vm.go
index 6396d5a..c8f8ff4 100644
--- a/aetest/instance_vm.go
+++ b/aetest/instance_vm.go
@@ -278,8 +278,7 @@
 const appYAMLTemplate = `
 application: %s
 version: 1
-runtime: go
-api_version: go1
+runtime: go111
 
 handlers:
 - url: /.*