pin appengine dependency version

Author: mfojtik

glide.lock

@@ -60,10 +60,12 @@ import:
   repo:    [email protected]:openshift/kubernetes
   version: release-1.8.1
 # only used by pkg/build/builder
+- package: google.golang.org/appengine
+  version: 12d5545dc1cfa6047a286d5e853841b6471f4c19
 - package: github.com/kubernetes-incubator/cri-o
   version: a8ee86b1cce0c13bd541a99140682a92635ba9f7
 - package: github.com/containers/image
   repo:    [email protected]:openshift/containers-image
   version: openshift-3.8
 - package: github.com/vjeantet/ldapserver
-  version: v1.0
+  version: v1.0