add correct database name for credhub
add correct database name for credhub

Signed-off-by: JT Archie <490a930afc9c4c60b7df4eac3c3d185c0e91dd4f@pivotal.io>

pivotal-cf/pcf-pipelines,pivotal-cf/pcf-pipelines,pivotal-cf/pcf-pipelines,pivotal-cf/pcf-pipelines