Pin rdopkg to 1.4.0

Latest release of rdopkg (1.5.0) with
error: metadata-generation-failed and is blocking the whole
CI.

We are currently pinning rdopkg to older version till we fix
the rdopkg or install rdopkg from RPM.

Related-Bug: #1993343

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I3382ead6eafe8a77b9b874ca7a22d4266851e3ac

roles/build-test-packages/tasks/main.yml

@@ -88,13 +88,15 @@
         state: latest
         extra_args: --upgrade
 
+    # FIXME(Chandan): Install rdopkg-1.4.0 as latest one is
+    # breaking the CI due to
+    # https://bugs.launchpad.net/tripleo/+bug/1993343
     - name: Pip install rdopkg
       # noqa 403
       pip:
-        name: rdopkg
+        name: rdopkg==1.4.0
         virtualenv: "{{ build_repo_dir }}/dlrn-venv"
         virtualenv_command: "/usr/bin/{{ python_cmd }} -m venv"
-        state: latest
       when: not dlrn_pre_installed|bool
 
     - name: Pip install DLRN