Add CircleCI config file
Add CircleCI config file

Signed-off-by: Dave Tucker <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@dtucker.co.uk>

DanCripe/libovsdb,mapuri/libovsdb,osrg/libovsdb,socketplane/libovsdb,statapudi/libovsdb,contiv/libovsdb,xsited/libovsdb