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>
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 66dde1c..cd70cf8 100755
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -43,6 +43,7 @@
 Features
 --------
     - `CPS-1696 <https://jira.onap.org/browse/CPS-1696>`_ Get Data Node to return entire List data node.
+    - `CPS-1819 <https://jira.onap.org/browse/CPS-1819>`_ Ability to disable sending authorization header.
 
 
 Version: 3.3.5