allow search by short name for others vms. if a search for a single VM yields more than one record, fail. (for saftey, this is used for vm deletion)

lib/vm.js

@@ -89,17 +89,17 @@ function findInstance(r, name) {
   var x;
   try {
     x = jsel.match('object:has(:root > .instanceId:val(?))', [name], r);
-    if (x.length) return x[0];
+    if (x.length === 1) return x[0];
   } catch(e) {}
 
   // is what the human typed in the vm "short name" ?
-  var fn = process.env.USER + "'s awsbox deployment (" + name + ")";
-  x = jsel.match('object:has(:root > .fullName:val(?))', [ fn ], r);
-  if (x.length) return x[0];
+  var fn = "awsbox deployment (" + name + ")";
+  x = jsel.match('object:has(:root > .fullName:contains(?))', [ fn ], r);
+  if (x.length === 1) return x[0];
 
   // or did the human type in the full name?
   x = jsel.match('object:has(:root > .fullName:val(?))', [ name ], r);
-  if (x.length) return x[0];
+  if (x.length === 1) return x[0];
 
   return undefined;
 }