Multi-Site: Removed Deprecation for SiteModel's siteIndicatorDepth

We removed the deprecation notice for siteIndicatorDepth as part of the SiteModel .

As part of this change cm validate-multisite got extended by a new issue code:

The new issue-code is reported at level INFO and is triggered, when using a siteIndicatorDepth different to 0 (zero).

Motivation

As part of CMS-9521 we deprecated siteIndicatorDepth for 2001.1 and changed the default to 0 (zero) rather than 1 (one), as we got aware that many editors struggled with site indicators being hidden in the "depth" of a site – which in the end caused corrupted sites.

Nevertheless, migrating existing content from a depth 1 to depth 0 may raise considerable migration effort, as you have to move all site indicators up one level in one step (while stopping editorial work) and then republish all your sites.

Because of this, we decided to remove the deprecation notice, so that we will support site indicator depths different to 0 also on in the future. The default which ships with CoreMedia Blueprint will stick to the recommended default 0 , though.

(CMS-19378)