Bug 1442545: [partner-repack] Add parameters needed for doing partner repacks; r=Callek

Differential Revision: https://phabricator.services.mozilla.com/D977

taskcluster/taskgraph/parameters.py

@@ -60,8 +60,13 @@ PARAMETERS = {
     'project': 'mozilla-central',
     'pushdate': lambda: int(time.time()),
     'pushlog_id': '0',
+    'release_enable_emefree': False,
+    'release_enable_partners': False,
     'release_eta': '',
     'release_history': {},
+    'release_partners': None,
+    'release_partner_config': None,
+    'release_partner_build_number': 1,
     'release_type': '',
     'target_tasks_method': 'default',
     'try_mode': None,