Request: Add /ngsi-ld/v1 to endpoints

[nordbergmikael]

According to 6.2 in the specification v1.5.1:

The apiName shall be set to "ngsi-ld" and the apiVersion shall be set to "v1" for the present document.
All resource URIs are defined relative to the above root URI. The structure of the resources under the root URI is
shown in figure 6.2-1 and methods defined on them are shown in table 6.2-1.