Pin rdopkg to 0.46.3

A new release of rdopkg has broken everything, we need to pin to the
last known good version.

Depends-On: I0b76c432440f78cab8199eb30c0295d53f137659
Change-Id: Ib28f20db0aa1db9f2c5b3cbbdae1c85c97bbeba1
Closes-Bug: #1787244

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

@@ -50,6 +50,13 @@
     state: latest
     extra_args: --upgrade
 
+- name: Pip install rdopkg
+  pip:
+    name: rdopkg
+    virtualenv: "{{ build_repo_dir }}/dlrn-venv"
+    version: 0.46.3
+  when: not dlrn_pre_installed|bool
+
 - name: Pip install DLRN
   pip:
     name: dlrn