backup: add archive flag

src/test/backups-test.js

@@ -30,7 +30,8 @@ describe('backups', function () {
         manifest: null,
         format: 'tgz',
         preserveSecs: 0,
-        label: ''
+        label: '',
+        archive: false
     };
 
     const appBackup = {
@@ -45,7 +46,8 @@ describe('backups', function () {
         manifest: { foo: 'bar' },
         format: 'tgz',
         preserveSecs: 0,
-        label: ''
+        label: '',
+        archive: false
     };
 
     describe('crud', function () {