Format credhub JSON correctly
Format credhub JSON correctly

[#154885542]

Signed-off-by: Slawek Ligus <7f6453cf264d8e0f493c7129c1ba7253720c5b2a@pivotal.io>

pivotal-cf/pcf-pipelines,sandyg1/pcf-pipelines,rahulkj/pcf-pipelines,sandyg1/pcf-pipelines,rahulkj/pcf-pipelines,pivotal-cf/pcf-pipelines,rahulkj/pcf-pipelines,sandyg1/pcf-pipelines,rahulkj/pcf-pipelines,pivotal-cf/pcf-pipelines,pivotal-cf/pcf-pipelines,sandyg1/pcf-pipelines