Upgrade MetaDefender ICAP Server

Before upgrading to the latest version of MetaDefender ICAP Server, it is needed to identify in which version you are currently running on.

• Upgrade to MetaDefender ICAP Server older than v5.2.0 (Sqlite) to version 5.2.0 -> v5.6.0 (PostgreSQL)

• Upgrade to MetaDefender ICAP Server v5.7.0 or newer