Improve logging in tempest cleanup

* add additional handler so that INFO messages are printed to stdout
  besided tempest.log
* replace print commands by LOG.info calls
* when --debug argument used print DEBUG messages to stdout
* add additional debug messages to improve transparency of the cleanup
  execution
* use --debug argument within tempest-cleanup ansible role to see more
  details directly in the output

Change-Id: Iee72dc411fdf5cda8a8eed8dd7f349e0866648ab
diff --git a/roles/tempest-cleanup/tasks/main.yaml b/roles/tempest-cleanup/tasks/main.yaml
index 5494fff..5444afc 100644
--- a/roles/tempest-cleanup/tasks/main.yaml
+++ b/roles/tempest-cleanup/tasks/main.yaml
@@ -3,7 +3,7 @@
     - name: Run tempest cleanup init-saved-state
       become: yes
       become_user: tempest
-      command: tox -evenv-tempest -- tempest cleanup --init-saved-state
+      command: tox -evenv-tempest -- tempest cleanup --init-saved-state --debug
       args:
         chdir: "{{ devstack_base_dir }}/tempest"
 
@@ -15,7 +15,7 @@
     - name: Run tempest cleanup dry-run
       become: yes
       become_user: tempest
-      command: tox -evenv-tempest -- tempest cleanup --dry-run
+      command: tox -evenv-tempest -- tempest cleanup --dry-run --debug
       args:
         chdir: "{{ devstack_base_dir }}/tempest"
 
@@ -25,7 +25,7 @@
 - name: Run tempest cleanup
   become: yes
   become_user: tempest
-  command: tox -evenv-tempest -- tempest cleanup
+  command: tox -evenv-tempest -- tempest cleanup --debug
   args:
     chdir: "{{ devstack_base_dir }}/tempest"
   when: not dry_run and not init_saved_state