Small fix to onos-publish-artifacts.py
Small fix to onos-publish-artifacts.py

Change-Id: I67fb06aaae1351712f0c74d4cc80608ab8853438

gkatsikas/onos,opennetworkinglab/onos,oplinkoms/onos,kuujo/onos,gkatsikas/onos,kuujo/onos,oplinkoms/onos,kuujo/onos,oplinkoms/onos,gkatsikas/onos,gkatsikas/onos,kuujo/onos,kuujo/onos,opennetworkinglab/onos,gkatsikas/onos,oplinkoms/onos,kuujo/onos,oplinkoms/onos,opennetworkinglab/onos,oplinkoms/onos,gkatsikas/onos,opennetworkinglab/onos,opennetworkinglab/onos,opennetworkinglab/onos,kuujo/onos,oplinkoms/onos