Fix compiling errors in test.
Fix compiling errors in test.

./ovs_integration_test.go:184:21: not enough arguments in call to Connect
    have (string, int)
    want (string, int, string)
./ovs_integration_test.go:486:21: not enough arguments in call to Connect
    have (string, int)
    want (string, int, string)

socketplane/libovsdb