Add functioanlity to get authetication token for 3scale tests
Add functioanlity to get authetication token for 3scale tests

jpopelka/fabric8-analytics-common,tisnik/fabric8-analytics-common,tisnik/fabric8-analytics-common,tisnik/fabric8-analytics-common,jpopelka/fabric8-analytics-common,jpopelka/fabric8-analytics-common