Bugfix/878 fix disallow sysctls (#899)

* - support wildcards for namespaces

* do not annotate resource, unless policy is an autogen policy

* close HTTP body

* improve messages

* only check sysctls if security context is defined

samples/best_practices/disallow_sysctls.yaml

@@ -18,5 +18,5 @@ spec:
       message: "Changes to kernel paramaters are not allowed"
       pattern:
         spec:
-          securityContext:
+          =(securityContext):
             X(sysctls): null