There is no point in having version suffixes in plugin packages. They
will via their control file anyway depend on the correct server or client
version. Having version suffices has no benefit and it just complicates
upgrades when a new major version name package needs to replace all
possible previous version.

This issue was overlooked when merging commit
844a5759 from 10.2 into 10.3, so it
needs to be manually fixed now.