Adding ofextensions/circuitsw features

Adding ofextensions/circuitsw features

1) Feature Tests Pass: https://jenkins.opendaylight.org/releng/job/circuitsw-merge-beryllium/
2) Features Comply with Guidelines:
https://git.opendaylight.org/gerrit/gitweb?p=ofextensions/circuitsw.git;a=blob;f=features/src/main/features/features.xml
        a) Feature Names: Prefixed with 'odl-' : odl-circuitsw-switch, odl-circuitsw-switch-ui, odl-circuitsw-switch-rest
        b) Feature Descriptions: Present
        c) Features Start-Levels: N/A
3) Features Tested: Features have been tested for functionality with
        a) feature:install odl-circuitsw-switch odl-circuitsw-switch-rest odl-circuitsw-switch-ui
        b) feature:install odl-integration-compatible-with-all
4) Integration Test Impact - None

Change-Id: I6c95f9b337d1e73c3e7a5e1a3ceadd7221d84859
Signed-off-by: Aneesha Pailla <apailla@calient.net>