fix CPI test and enable debug log for it
fix CPI test and enable debug log for it

jfuerth/bosh-aws-cpi-release,wcamarao/bosh-aws-cpi-release,tracyde/bosh-aws-cpi-release,wcamarao/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release,jfuerth/bosh-aws-cpi-release,tracyde/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release,tracyde/bosh-aws-cpi-release,wcamarao/bosh-aws-cpi-release,jfuerth/bosh-aws-cpi-release