docs(managing-workflow): Add docs about resource quota for application namespace

Author: v-reyder

src/managing-workflow/tuning-component-settings.md

@@ -56,6 +56,7 @@ RESERVED_NAMES                                  | a comma-separated list of name
 SLUGRUNNER_IMAGE_NAME                           | the image used to run buildpack application slugs (default: "quay.io/deisci/slugrunner:canary")
 DEIS_DEPLOY_REJECT_IF_PROCFILE_MISSING          | rejects a deploy if the previous build had a Procfile but the current deploy is missing it. A 409 is thrown in the API. Prevents accidental process types removal. (default: "false", allowed values: "true", "false")
 DEIS_DEPLOY_PROCFILE_MISSING_REMOVE             | when turned on (default) any missing process type in a Procfile compared to the previous deploy is removed. When set to false will allow an empty Procfile to go through without removing missing process types, note that new images, configs and so on will get updated on all proc types.  (default: "true", allowed values: "true", "false")
+KUBERNETES_NAMESPACE_DEFAULT_QUOTA_SPEC         | set resource quota to application namespace by setting [ResourceQuota](http://kubernetes.io/docs/admin/resourcequota/) spec, for example: `{"spec":{"hard":{"pods":"10"}}}`, restrict app owner to spawn more then 10 pods (default: "", no quota will be applied to namespace)
 
 ### Global and per application settings