* added configmap data substitution for foreground mutate and validate
* added configmap data substitution for foreground mutate and validate fmt
* added configmap lookup for background
* added comments to resource cache
* added configmap data lookup in preConditions
* added parse strings in In operator and configmap lookup docs
* added configmap lookup docs
* modified configmap lookup docs
* store policy names cache to reduce lookup time
* add validate audit handler
* fix#958, remove auto-gen annotation on Pod
* formatting code
* update processTime to readable format
* #586, add back unit test
* update logging info
* remove unused interface
* handle generate policy in a single thread in weboook
* resolve pr comments