[patch] fix db2 parsing (#2000)

Author: terc1997

ibm/mas_devops/roles/db2/tasks/install/main.yml

@@ -151,7 +151,7 @@
         name: ibm-registry
         namespace: "{{ db2_namespace }}"
       data:
-        .dockerconfigjson: "{{ new_secret | b64encode }}"
+        .dockerconfigjson: "{{ new_secret | to_json | b64encode }}"
   register: secretUpdateResult
 
 - name: "Delete old db2 subscription, operand request and csv from {{ ibm_common_services_namespace }}"

ibm/mas_devops/roles/db2/tasks/install/setup_norootsquash.yml

@@ -27,7 +27,7 @@
         name: ibm-registry
         namespace: kube-system
       data:
-        .dockerconfigjson: "{{ new_secret | b64encode }}"
+        .dockerconfigjson: "{{ new_secret | to_json | b64encode }}"
   register: secretUpdateResult
 
 # 3. Create DaemonSet