This commit removes the SecuredString class that was previously used throughout the security code
and replaces it with the SecureString class from core that was added as part of the new secure
settings infrastructure.
relates elastic/x-pack-elasticsearch#421
Original commit: elastic/x-pack-elasticsearch@e9cd117ca1
This built-in watcher_admin role is able to execute all watcher actions,
read the watch history indices and read the watches index
index. The watcher_user role allows to GET a watch and to get the stats and thats it.
relates elastic/x-pack-elasticsearch#978
Original commit: elastic/x-pack-elasticsearch@11b33a413b