Fixed syntax for heredoc file
Fixed syntax for heredoc file

Created separate variables.tf file for interpolation

[#99573896](https://www.pivotaltracker.com/story/show/99573896)

Signed-off-by: Aaron Hurley <6c541e38cb40b4360b80e64c308405691f38e38a@pivotal.io>

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