aws bootstrap commands run non-interactively when passed -n flag after 'bosh'

[finishes #43368725]
release packaging and ctl scripts to isolate gems
Added tests and cleaned up cli command 'aws snapshot deployments'
fixed two aws cpi bugs

- user_data has to be a string
- disks need an availability zone
run bat test from bat dir and also run bosh with bundle exec
BAT can use key_name on AWS
AWS bootstrap CLI command now takes an ERB'd YAML file
Initial CI AWS integration build script
Load RVMRC as part of build
Added VPC test to the AWS CPI integration spec
changed lack of CPI_CONFIG_FILE from exception to pending

- travis can't contain secrets :(