FIBOFND11 — Then change in which PostalAddress was renamed to PhysicalAddress is not backwardly compatible

When PostalAddress was renamed to PhysicalAddress this created a non backward compatible change to the Addresses ontology. This needs to be changed to a non-disruptive change so that BE and others can still refer to the class PostalAddress.

Retain the existing PostalAddress concept alongside the new PhysicalAddress concept in the Addresses ontology

Add a new class PostalAddress with the same assertions as the original class of that name, as a sub class of the previously renamed PhysicalAddress.

Note that for OWL backward compatibility it is sufficient that the assertions exist (including by inheritance), so it is not necessary to add back the sub class relationships that the original class had, since these are inherited by the class now called PhysicalAddress.