Set content_provider_dlrn_md5_hash default to empty string

Earlier we set content_provider_dlrn_md5_hash to nowhere, it breaks
the tcib content provider dependent EDPM job saying nowhere repo not
found.

Returning it to empty string and make sure we set the dlrn_hash_tag
value on non empty string content_provider_dlrn_md5_hash value
fixes the issue.

Signed-off-by: Chandan Kumar <raukadah@gmail.com>

ci/playbooks/tcib/run.yml

@@ -64,12 +64,12 @@
         msg: >-
           Running Content provider registry on
           {{ node_ip | default('nowhere') }} with dlrn md5 hash
-          {{ _dlrn_md5 | default('nowhere') }}
+          {{ _dlrn_md5 | default('') }}
 
     - name: Set up content registry IP address
       zuul_return:
         data:
           zuul:
             pause: true
           content_provider_registry_ip: "{{ node_ip | default('nowhere') }}"
-          content_provider_dlrn_md5_hash: "{{ _dlrn_md5 | default('nowhere') }}"
+          content_provider_dlrn_md5_hash: "{{ _dlrn_md5 | default('') }}"

roles/repo_setup/tasks/configure.yml

@@ -2,7 +2,9 @@
 - name: Set cifmw_repo_setup_dlrn_hash_tag from content provider
   ansible.builtin.set_fact:
     cifmw_repo_setup_dlrn_hash_tag: "{{ content_provider_dlrn_md5_hash }}"
-  when: content_provider_dlrn_md5_hash is defined
+  when:
+    - content_provider_dlrn_md5_hash is defined
+    - content_provider_dlrn_md5_hash | length > 0
 
 - name: Run repo-setup
   become: "{{ not cifmw_repo_setup_output.startswith(ansible_user_dir) }}"