deleting app info at the login node when we remove an app, not just at appengine nodes
Merge pull request #736 from shatterednirvana/delete-app-info-on-login-node

deleting app info at the login node when we remove an app
shortening down instance names to 62 characters, to please GCE
Merge pull request #737 from shatterednirvana/limit-instance-name-length

shortening down instance names to 62 characters, to please GCE