Include server ID in server info page

Users are having difficulty in identifying which license key the instance is running on. The user may have bought two dev license with the exact details except the license keys being unique. Hence, there is a difficulty in checking which instance are running on which license key via confluence.cfg.xml as the license.message there is simplified and the license.hash has been changed in some ways.

Checking it through the user purchase details only lists the license details but not the key.