Fix inspecting refstack_result

refstack_result is used to register result of running
refstack-client, however, it was used in 2 different tasks one of
which was always skipped. There may happen a situation (when the
latter task is skipped), the skipped task overrides the result
of the refstack-client execution from the other task.
The patch fixes that by using a different variable for each of
the tasks running refstack-client.

Change-Id: I6f524df674dfbb2d6b9372dce51f1e1aec8ed9be

tasks/main.yaml

@@ -40,6 +40,6 @@
     - name: Check if we passed tests of all specified target programs
       fail:
         msg: "Refstack tests failed."
-      # the refstack_result var got set in run-refstack-client.yaml
+      # the refstack_results var got set in run-refstack-client.yaml
       when: item.rc > 0
-      with_items: "{{ refstack_result.results }}"
+      with_items: "{{ refstack_results.results }}"

tasks/run-refstack-client.yaml

@@ -44,9 +44,9 @@
   args:
     chdir: "{{ refstack_client_source }}"
     executable: /bin/bash
-  register: refstack_result
+  register: refstack_results
   # don't fail here in order to allow post_tasks be executed,
-  # the refstack_result is inspected in the last task of the role where it
+  # the refstack_results is inspected in the last task of the role where it
   # fails if it failed here
   ignore_errors: true
   with_items: "{{ refstack_target_programs }}"