Setup vcap ssh access from go agent
[#59695120]

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Prepare stemcell builder to handle multiple agents

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Reorganized code into packages

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Adding go to stemcell building VM

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Adding bosh_go_agent stemcell stage and code to excercise it

Signed-off-by: Damien Le Berrigaud <damien@pivotallabs.com>
Improved error handling

Signed-off-by: Jeffrey Peckham <peckham@pivotallabs.com>
Get settings from AWS infrastructure

Signed-off-by: Jeffrey Peckham <peckham@pivotallabs.com>
Adding support for multiple infrastructures

Signed-off-by: Jeffrey Peckham <peckham@pivotallabs.com>