Remove the name from task() functions that refer to themselves

When using the task() expression function, it will default to referring
to the current tasks. This means that the name doesn't need to be provided.

Change-Id: I82db486c13a0c7d6831a2994ba07745559776079

workbooks/baremetal.yaml

@@ -26,7 +26,7 @@ workflows:
         retry:
           delay: 3
           count: 400
-          continue-on: <% task(wait_for_provision_state).result.provision_state != $.target_state %>
+          continue-on: <% task().result.provision_state != $.target_state %>
 
   set_power_state:
     input:
@@ -49,7 +49,7 @@ workflows:
         retry:
           delay: 6
           count: 20
-          continue-on: <% task(wait_for_power_state).result.power_state != $.target_state %>
+          continue-on: <% task().result.power_state != $.target_state %>
 
   manual_cleaning:
     input:

workbooks/deployment.yaml

@@ -374,7 +374,7 @@ workflows:
           queue_name: <% $.queue_name %>
           reproduce_command: true
         publish:
-          log_path: <% task(run_ansible).result.get('log_path') %>
+          log_path: <% task().result.get('log_path') %>
         on-success:
           - ansible_passed: <% task().result.returncode = 0 %>
           - ansible_failed: <% task().result.returncode != 0 %>

workbooks/stack.yaml

@@ -56,7 +56,7 @@ workflows:
         retry:
           delay: 15
           count: <% $.timeout / 15 %>
-          continue-on: <% $.stack in task(wait_for_stack_does_not_exist).result.select([$.stack_name, $.id]).flatten() %>
+          continue-on: <% $.stack in task().result.select([$.stack_name, $.id]).flatten() %>
 
   delete_stack:
     input:

workbooks/undercloud_backup.yaml

@@ -49,7 +49,7 @@ workflows:
         publish:
             status: SUCCESS
             message: <% task().result %>
-            undercloud_db_password: <% task(get_database_credentials).result.variables.undercloud_db_password %>
+            undercloud_db_password: <% task().result.variables.undercloud_db_password %>
         on-success: create_database_backup
         on-error: send_message
         publish-on-error: