Added an additional JWT issuer to the credentials service

This restores backward-compatibility with the current method of token issuance betwen LMS and the Credentials Service.

ECOM-6938

playbooks/roles/credentials/defaults/main.yml

@@ -163,6 +163,9 @@ CREDENTIALS_JWT_AUTH:
     - AUDIENCE: '{{ CREDENTIALS_JWT_AUDIENCE }}'
       ISSUER: '{{ CREDENTIALS_JWT_ISSUER }}'
       SECRET_KEY: '{{ CREDENTIALS_JWT_SECRET_KEY }}'
+    - AUDIENCE: '{{ CREDENTIALS_SOCIAL_AUTH_EDX_OIDC_KEY }}'
+      ISSUER: '{{ CREDENTIALS_JWT_ISSUER }}'
+      SECRET_KEY: '{{ CREDENTIALS_SOCIAL_AUTH_EDX_OIDC_SECRET }}'
 
 CREDENTIALS_SERVICE_CONFIG:
   SECRET_KEY: '{{ CREDENTIALS_SECRET_KEY }}'