Adding SNBI features

Adding SNBI features

1) Feature Tests Pass: https://jenkins.opendaylight.org/releng/view/snbi/job/snbi-merge-beryllium/109/
2) Features Comply with Guidelines: https://git.opendaylight.org/gerrit/gitweb?p=snbi.git;a=blob;f=features/src/main/resources/features.xml;h=0bad7bc43d6f1c62004c68848ff9db028b88605d;hb=HEAD
    a) Feature Names (prefixed with 'odl-'): odl-snbi-all
    b) Features Descriptions: Present
    c) Features Start-Levels: No start levels
3) Features Tested: Features have been tested for functionality with
    a) feature:install odl-restconf
    b) feature:install odl-snbi-all
4) Integration Test Impact: None

Change-Id: I8187ad456c47c00df36aec8589374ef983743894
Signed-off-by: Vijay Anand R <vanandr@cisco.com>