Docs: remove incorrect name attribute from role snippet
Docs: remove incorrect name attribute from role snippet

relates elastic/x-pack-elasticsearch#2497

Original commit: elastic/x-pack-elasticsearch@7d70f1c0ea3058c74465e380c7061093788e2106

strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elassandra,vroyer/elassandra