Revert "Override log_file from soft parameters"

This reverts commit ca3879d904311fc070f43cd674f3f66bca939ed6.

Change-Id: I588ffb7858a1c348e08c6b15ca71ba3b228648dd
diff --git a/classes/cluster/virtual-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index f61e49d..48a3f99 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -127,7 +127,6 @@
     barbican_integration_enabled: False
     runtest_tempest_cfg_dir: /root/rally_reports/
     runtest_tempest_cfg_name: tempest_generated.conf
-    runtest_tempest_log_file: /home/rally/rally_reports/tempest.log
     artifactory_user: artifactory_user
     artifactory_password: artifactory_password
   galera:
@@ -193,6 +192,8 @@
       enabled: True
       cfg_dir: ${_param:runtest_tempest_cfg_dir}
       cfg_name: ${_param:runtest_tempest_cfg_name}
+      DEFAULT:
+        log_file: /home/rally/rally_reports/tempest.log
       compute:
         build_timeout: 600
         min_microversion: 2.1