devel/py-oslo.service: Update to 2.8.0

Changes:	https://docs.openstack.org/oslo.service/latest/user/history.html

devel/py-oslo.service/Makefile

 # Created by: Alexander Nusov <alexander.nusov@nfvexpress.com>
 
 PORTNAME=	oslo.service
-PORTVERSION=	2.7.0
+PORTVERSION=	2.8.0
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

devel/py-oslo.service/distinfo

-TIMESTAMP = 1635181067
-SHA256 (oslo.service-2.7.0.tar.gz) = 82fd8b4826a6ad3a33f66c51226a2436a2659988a5ba5b24527a197b1a313871
-SIZE (oslo.service-2.7.0.tar.gz) = 84647
+TIMESTAMP = 1642102289
+SHA256 (oslo.service-2.8.0.tar.gz) = 15680c007cc8f45e3e0ee98881b58e21baffac1a31d0aa7f855c6a788f04bd8e
+SIZE (oslo.service-2.8.0.tar.gz) = 84816