Add option to disable automatic write of sysfs attributes

Fixes: PROD-23149 (PROD:23149)

Change-Id: I14c68a0a519a63951571f966fae72fd01ec2e556
diff --git a/tests/pillar/system.sls b/tests/pillar/system.sls
index aa1c7ed..a0a3e04 100644
--- a/tests/pillar/system.sls
+++ b/tests/pillar/system.sls
@@ -99,6 +99,7 @@
             subjects:
             - '@group1'
     sysfs:
+      enable_apply: true
       scheduler:
         block/sda/queue/scheduler: deadline
       power: