Ldap nestedGroup examples
Added nestedGroup option to documentation of the ldap authentication section.
Added nestedGroups option set to false in rundeckapp/web-app/WEB-INF/jaas.conf
Use a subclass of AdminServlet to allow disabling the metrics servlets

config properties:

rundeck.web.metrics.servlets.[name].enabled=true/false

names are:

* metrics
* threads
* ping
* healthcheck
Document disabling the Metrics servlets
Merge pull request #892 from knifhen/master

Ldap nestedGroup examples
Set allowedMethods for all non-idempotent actions
Cleanup: use private methods instead of closures
Use POST for dynamic form destination
Remove unused execAndForget action
Add CSRF prevention using grails form tokens
Upload form correctly uses token
Add form tokens to create project
Use form token for project edit form
Reimplementation of synchronizer token pattern using hmac digest
Update HMAC token synchronizer for compatibility with grails builtin
Change project create back to using grails form token
Fix job upload missing file error message
Fix json embed of tokens
EditOpts actions use form token
Correctly report isEmpty for tokens holder
Add debug logging for tokens holder