Upgrade to TeamForge 17.8 on same hardware: RHEL/CentOS 6.9/7.3

The following instructions are valid for upgrading to TeamForge 17.8 on the same hardware on both RHEL/CentOS 6.9/7.3 platforms. Specific steps, if applicable only for a particular RHEL/CentOS platform, are called out explicitly.

Before you begin: