recipe/pbs: slave-instance-list is already a list of JSON

See nexedi/slapos!739

slapos/recipe/pbs.py

@@ -57,7 +57,7 @@ class Recipe(GenericSlapRecipe, Notify, Callback):
   def _options(self, options):
     options['rdiff-backup-data-folder'] = ""
     if 'slave-instance-list' in options:
-      for slave in json.loads(options['slave-instance-list']):
+      for slave in options['slave-instance-list']:
         if slave['type'] == 'pull':
           options['rdiff-backup-data-folder'] = str(os.path.join(options['directory'], slave['name'], 'rdiff-backup-data'))
 
@@ -299,8 +299,7 @@ class Recipe(GenericSlapRecipe, Notify, Callback):
 
     if self.optionIsTrue('client', True):
       self.logger.info("Client mode")
-
-      slaves = json.loads(self.options['slave-instance-list'])
+      slaves = self.options['slave-instance-list']
       known_hosts = KnownHostsFile(self.options['known-hosts'])
       with known_hosts:
         for slave in slaves:

slapos/test/recipe/test_pbs.py

@@ -82,7 +82,7 @@ class PBSTest(unittest.TestCase):
             'run-directory': run_directory,
             'cron-entries': cron_directory,
             'known-hosts': 'TEST_KNOWN_HOSTS',
-            'slave-instance-list': '''[
+            'slave-instance-list': [
                 {
                  "url": "http://url.to.pull/",
                  "type": "pull",
@@ -101,7 +101,6 @@ class PBSTest(unittest.TestCase):
                  "frequency": "TEST_FREQUENCY"
                         }
                 ]
-                '''
             })
 
         recipe._install()