Add Cache-Control headers to redirect responses

[ineale2]

What would you like to be added:

• Set cache-control and pragma headers to the redirect responses

Why is this needed:

• When the Authenticator redirects to Cognito or with the set-cookies header, some browsers (IE11 in specific) cache the 302 response as no cache-control headers are set.
• When subsequent requests come (with valid cookies), IE11 will retrieve the cached 302 response and get stuck in a redirect loop

[jeandek]

Merged and will be included in next release.