add sl credentials to sl-go-integration
add sl credentials to sl-go-integration

mattcui/bosh-softlayer-tools,cloudfoundry-community/bosh-softlayer-tools,cloudfoundry-community/bosh-softlayer-tools,mattcui/bosh-softlayer-tools,maximilien/bosh-softlayer-stemcells,maximilien/bosh-softlayer-stemcells