REST Cache create and remove

Implement cache creation/removal over HTTP.
Since WebDAV (RFC-4918) describes operations over "collections", we can reuse the semantics of invocations and error messages. In particular:

https://tools.ietf.org/html/rfc4918#section-9.3
https://tools.ietf.org/html/rfc4918#section-9.6.1

Cache creation:

*MKCOL /

[?template=

]*
This will create the named cache, using the optionally supplied template name for configuration. If a template is not specified, then the configuration of the default cache defined on the cache container will be used.

Cache removal

DELETE /[cacheName]
This method's behaviour is affected by the presence and value of the `Depth` header.
The header can have the following values:

• infinity,noroot: deletes the contents of the cache. This is the default behaviour (for backwards compatibility this does not respect the behaviour described in link:https://tools.ietf.org/html/rfc4918#section-9.6.1[WebDAV RFC] regarding removal of collections). If successful this operation returns a status of 200.
• infinity: removes the cache from the system. If security is enabled, you will need ADMIN permissions. If successful, this operation returns a status of 204 (No Content). This method also understands <<rest:adminflags>>