Adding library, netvirt-sfc, southbound, hwvtedpsouthbound features

Adding library, netvirt-sfc, southbound, hwvtedpsouthbound features

1) Feature Tests Pass: https://jenkins.opendaylight.org/releng/view/ovsdb/job/ovsdb-merge-beryllium/
2) Features Comply with Guidelines:  https://git.opendaylight.org/gerrit/gitweb?p=ovsdb.git;a=blob;f=library/features/src/main/features/features.xml;h=07ede6d877df0ad70685d9b5338b3c90ebb9af4e;hb=HEAD
https://git.opendaylight.org/gerrit/gitweb?p=ovsdb.git;a=blob;f=openstack/net-virt-sfc/features/production/src/main/features/features.xml;h=3413bc8d18a02b4a45d38d13aaf1d3b4689ed6b9;hb=HEAD
https://git.opendaylight.org/gerrit/gitweb?p=ovsdb.git;a=blob;f=southbound/southbound-features/src/main/features/features.xml;h=b66393266559ec1f479b6041a4d4346439933b22;hb=HEAD
https://git.opendaylight.org/gerrit/gitweb?p=ovsdb.git;a=blob;f=hwvtepsouthbound/hwvtepsouthbound-features/src/main/features/features.xml;h=967a07c36ae80b821bfa68097e494519d100e769;hb=HEAD
	a) Feature Names (prefixed with 'odl-'):
    odl-ovsdb-library
    odl-ovsdb-sfc
    odl-ovsdb-southbound-impl
    odl-ovsdb-hwvtepsouthbound
	b) Features Descriptions: Present
	c) Features Start-Levels: N/A
3) Features Tested: Features have been tested for functionality with
	a) feature:install odl-ovsdb-library odl-ovsdb-sfc  odl-ovsdb-southbound-impl odl-ovsdb-hwvtepsouthbound
	b) feature:install odl-ovsdb-library odl-ovsdb-sfc  odl-ovsdb-southbound-impl odl-ovsdb-hwvtepsouthbound odl-integration-compatible-with-all
4) Integration Test Impact: N/A

Change-Id: I631c1ba9ff7f8377c27d594db43cd76868b840ef
Signed-off-by: adetalhouet <adetalhouet@inocybe.com>