FOGL-7706: fetch plugins using notification service ip and port

[pintomax]

FOGL-7706: fetch plugins using notification service ip and port

[pintomax]

@ashwinscale @ashish-jabble please test and approve.

This fix should be added to new release as it is requested by new customers

[praveen-garg]

@MarkRiddoch is this safe to consider for release at this point?

• This is not a regression.
• We know the workaround and design of this.
• This will require a good amount of testing and need to be checked for all notification related endpoints.
• A longer term fix could be considered to have consistent additional services interface via REST API.