fix incorrect body of TestACLEndpoint_PolicyBatchRead
fix incorrect body of TestACLEndpoint_PolicyBatchRead

Lifted from PR #5307 as it was an unrelated drive-by fix on that PR anyway.

s/token/policy/

scalp42/consul,kingland/consul,kingland/consul,hashicorp/consul,scalp42/consul,scalp42/consul,hashicorp/consul,42wim/consul,kingland/consul,42wim/consul,hashicorp/consul,42wim/consul,scalp42/consul,hashicorp/consul,kingland/consul,scalp42/consul,42wim/consul,42wim/consul,kingland/consul