add ADD_DEFAULT policies to the custom pols in IAS

geant/gap_ansible/roles/policy_options/tasks/merge_nren_vrf_custom_vars.yaml

 ---
+
 - name: Load Default route V4 prefix list if "send_default_route" is selected
   when: bgp_session_v4.send_default_route | ansible.builtin.bool
-  ansible.builtin.set_fact:
-    po_prefix_default_route_v4: "{{ lookup('community.general.merge_variables', 'IAS_PO_PREFIX_TRACKING_DEFAULT_V4') }}"
+  block:
+    - name: Load PO default route prefix list V4
+      ansible.builtin.set_fact:
+        po_prefix_default_route_v4: "{{ lookup('community.general.merge_variables', 'IAS_PO_PREFIX_TRACKING_DEFAULT_V4') }}"
+
+    - name: Load PO default route policy V4
+      ansible.builtin.set_fact:
+        po_policy_default_route_v4: "{{ lookup('community.general.merge_variables', 'IAS_PO_POL_ADD_DEF_ROUTE_V4') }}"
 
 - name: Load Default route V6 prefix list if "send_default_route" is selected
   when: bgp_session_v6.send_default_route | ansible.builtin.bool
-  ansible.builtin.set_fact:
-    po_prefix_default_route_v6: "{{ lookup('community.general.merge_variables', 'IAS_PO_PREFIX_TRACKING_DEFAULT_V6') }}"
+  block:
+    - name: Load PO default route prefix list V6
+      ansible.builtin.set_fact:
+        po_prefix_default_route_v6: "{{ lookup('community.general.merge_variables', 'IAS_PO_PREFIX_TRACKING_DEFAULT_V6') }}"
+
+    - name: Load PO default route policy V6
+      ansible.builtin.set_fact:
+        po_policy_default_route_v6: "{{ lookup('community.general.merge_variables', 'IAS_PO_POL_ADD_DEF_ROUTE_V6') }}"
+
 
 - name: Load Standard Policy Options prefix lists for VRF {{ subscription.product.product_type | upper }}
   ansible.builtin.set_fact:
@@ -27,6 +41,16 @@
   ansible.builtin.set_fact:
     po_final_policies: "{{ lookup('community.general.merge_variables', 'CUSTOM_VRF_PO_POLICIES') }}"
 
+- name: Add V4 default route policy to the final policy var
+  when: bgp_session_v4.send_default_route | ansible.builtin.bool
+  ansible.builtin.set_fact:
+    po_final_policies: "{{ [po_final_policies, po_policy_default_route_v4] | community.general.lists_mergeby('name') }}"
+
+- name: Add V6 default route policy to the final policy var
+  when: bgp_session_v6.send_default_route | ansible.builtin.bool
+  ansible.builtin.set_fact:
+    po_final_policies: "{{ [po_final_policies, po_policy_default_route_v6] | community.general.lists_mergeby('name') }}"
+
 - name: Load Standard Policy Options prefix lists for VRF {{ subscription.product.product_type | upper }}
   ansible.builtin.set_fact:
     po_vrf_communities: "{{ lookup('community.general.merge_variables', 'STANDARD_VRF_COMMUNITIES') }}"