Change default log level of IDP

- the IDP log level is now configurable via the idp_log_level variable
- the IDP log level default has been changed to 'debug' to be compatible
  with changes in
  1e676e8cf1

deployment/roles/oidc_idp/templates/idp_config.toml.j2

@@ -16,4 +16,4 @@ enc-key = "{{ idp_enc_key | default(lookup('community.general.random_string', le
 url = "https://{{ oidc_urls.hydra_admin.address | default("hydra.cacert.localhost") }}:{{ oidc_urls.hydra_admin.port | default("3000") }}"
 
 [log]
-level = "trace"
+level = "{{ idp_log_level | default('debug') }}"