Local secrets provider Content-Type handling
Properly handle and enforce ithe presence of the content-type header
in the local and proxy providers to conform to the Custoida protocol.
Avoids different behavior between the local provider and a remote server
that may cause developers to have an application working against the
local storage and then fail when the administrator configures a remote
storage.
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>