Readme shows "iot/d" instead of "iot/ul" path

[XavierVal]

To users that want to specify a different defaultResource for the agents instead of use the same for all the agents

https://github.com/telefonicaid/iotagent-ul/blob/develop/README.md#http-binding

Related to:
telefonicaid/iotagent-json#150

[KeshavSoni2511]

Hi @fgalan , I have investigated this issue. I was able to get services and devices while giving iot/ul instead of iot/d if I setup service group with iot/ul. Do we need to update the same in doc file? Please let me know your opinion. Thanks

[fgalan]

Looking to the sister issue, that one was closed time ago (year 2018) so I think is good idea to close also this one.

With regards to resource-related issue, I think we can continue discussion on #590

[mapedraza]

@Keshav-NEC if you are interested to keep on working in this, issue #590 is still open and it's more detailed