Add tests for Basic auth response header
Add tests for Basic auth response header

[#166795492]

Signed-off-by: Oleksandr Slynko <4e0b08036a6e8359453f77324c7b401fdae249da@pivotal.io>

cloudfoundry-incubator/bits-service,cloudfoundry-incubator/bits-service,cloudfoundry-incubator/bits-service,cloudfoundry-incubator/bits-service,cloudfoundry-incubator/bits-service