Add SSL verification for DLRN actions

In downstream build-test-packages is failing on Task
: Run DLRN because with [SSL: CERTIFICATE_VERIFY_FAILED]

Exporting correct cert before running DLRN actions for downstream case
based on condition if OS is rhel.

Change-Id: I7c27d21a565b5672d0a455f55c9a7f4a4231c1d6

roles/build-test-packages/templates/run_dlrn.sh.j2

@@ -7,6 +7,9 @@ export PKG={{ project_name_mapped.stdout }}
 {% else %}
 export PKG="{{ artg_rdo_packages|join(' --package-name ') }}"
 {% endif %}
+{% if ansible_distribution|lower  == "redhat" %}
+export REQUESTS_CA_BUNDLE=/etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt
+{% endif %}
 
 while true; do
     dlrn --config-file projects.ini --head-only --package-name $PKG --local \