Override log_file from soft parameters

Recently there was added an ability to override log_file
from soft paramters in runtest formula metadata. So we switch
now to this aproach.

Depends-On: I714cfddf74da1a41948a3f82297817863ee1321f

Change-Id: I1fac49f1c872f58ba40d339ff10bc43d8116d101
Related-Prod: https://mirantis.jira.com/browse/PROD-18729
(cherry picked from commit 9feffd573dfd2dd1bb4f8eb81fb9f19d00f5d108)
diff --git a/classes/cluster/virtual-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index 48a3f99..f61e49d 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -127,6 +127,7 @@
     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:
@@ -192,8 +193,6 @@
       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