Update collectives_halo syntax

Author: ekouts

cscs-checks/mch/collectives_halo.py

@@ -110,8 +110,8 @@ def __init__(self, variant, bench_reference):
         self.maintainers = ['AJ', 'MKr']
         self.tags = {'production', 'mch', 'craype'}
 
-    def setup(self, *args, **kwargs):
-        super().setup(*args, **kwargs)
+    @rfm.run_before('run')
+    def set_launcher_options(self):
         if self.current_system.name in ['arolla', 'kesch', 'tsa']:
             self.job.launcher.options = ['--distribution=block:block',
                                          '--cpu_bind=q']