export HOME env var so bundler writes .bundle directory in the install target.
export HOME env var so bundler writes .bundle directory in the install
target.

[#90634858]

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