Project Maturity Review for External API Framework

This project describes and define the APIs between ONAP and External Systems, including ONAP interfaces targeted on BSS/OSS, peering, B2B, etc.
Initial focus is on the Common APIs between ONAP and BSS/OSS.
Common APIs between ONAP and BSS/OSS allow Service Providers to utilize the capabilities of ONAP using their existing BSS/OSS environment with minimal customization.

add lines if necessarry

Role	Name (must use @ macro )	Linux Foundation Login (LFID)	Email Address (if different from @ macro)
PTL	Adrian OSullivan	aosull01	adrian.osullivan@huawei.com
Committers	Matthieu Geerebaert	matthieugeerebaert	matthieu.geerebaert@orange.com
	@Andy Maher	ajmayer	am803u@att.com
	Eric Debeau	eric.debeau	eric.debeau@orange.com
	@Mark Gibson	markgi	markgi@amdocs.com

How long the project has been an active: At launch of ONAP the date is 5th of November 22017
Release Participation: All ONAP Releases (Amsterdam Release through Frankfurt Release)

Engagement levels for past releases (up to 3):

Companies per release: see Release table below

Release name and timeframe	commits	contributors	companies
Beijing ( 11/17/2017 to 6/7/2018 )	184	12	6
Cassablanca ( 6/8/2018 to 11/30/2018 )	142	10	4
Dublin ( 12/1/2018 to 7/9/2019 )	173	18	7
El Alto ( 7/10/2019 to 10/24/2019 )	52	8	4
Frankfurt ( 10/25/2019 to 6/18/2020 )	133	15	9

codes:
- https://gerrit.onap.org/r/externalapi/nbi
documentations:
- External API Documentation landing page : https://docs.onap.org/projects/onap-externalapi-nbi/en/latest/index.html#master-index
ExtAPI project team members, contributed, in all ONAP release from Beijing and in the successful completion of integration team testing (BBS, CCVPN, E2E Network Slicing)
To our knowledge, the following companies have used ONAP ExtAPI internally: AT&T, Orange, Vodafone, Swisscom, China Mobile, Huawei, Tech Mahindra, Wipro, HCL