bump inigo
bump inigo

[finishes #105158076]

Submodule src/github.com/cloudfoundry-incubator/inigo 3d2b2ee..cdfdac4:
  > Cleanup docker tests
  > use only dockerRef for docker app lifecycle

Signed-off-by: Dan Lavine <5ca8f6c726ce2120d02818e3c4896f90201eef24@us.ibm.com>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release