IoT-Agent drops routes /iot/services

[tstorek]

Describe the bug
The latest node-lib-version drops the routes: /iot/services and replaces it with /iot/groups
https://github.com/telefonicaid/iotagent-node-lib/releases/tag/4.6.0
This will lead to errors when using the iota-client with service groups.

To Reproduce
Steps to reproduce the behavior:

1. Install newest version of IoT-Agent
2. try and see

Expected behavior
A proper handling of this issue by supporting both routes for now.
Either based on the IoT-agent version or simply try and error.

[djs0109]

@tstorek, since this is a breaking change, I will not go in a hurry. Or are there any new features in IoTAgent-JSON 3.6 (corresponding to node lib 4.6.0) that motivate us to upgrade the version support immediately?

[tstorek]

@tstorek nope. that is just a hint that this will arise soon