promise/plugin: check_file_state configurability

Allow to configure periodicity and anomaly in the profile, as otherwise the
promise configuration is not flexible enough for the profile developer, which
has to decide what shall be the effect of promise failure and when it shall
be checked.

slapos/promise/plugin/check_file_state.py

@@ -13,6 +13,14 @@ class RunPromise(GenericPromise):
     self.result_count = int(self.getConfig('result-count', '1'))
     self.failure_amount = int(self.getConfig('failure-amount', '1'))
 
+    if self.getConfig(
+      'perdiodic-only', 'false').lower() in ('true', 'yes', '1'):
+      self.setTestLess()
+
+    if self.getConfig(
+      'report-anomaly', 'true').lower() in ('false', 'no', '0'):
+      self.setAnomalyLess()
+
   def sense(self):
     """
       Check state of the filename