Ability to disable sending auth header

- introduced configurable parameter to disable sending auth header in
  the request to dmi-plugin
- default is to include the auth header
- DMI_AUTH_ENABLED flag can be set to true/false to control the
  behaviour
- Also added the env variables to the CSITs
- updated release-notes

Issue-ID: CPS-1819
Change-Id: If97c06e33f06e391d2190b7300d73210ed2f4e27
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
8 files changed