wa: Rename update_results reference to update_output

To be consistant with the rename of output_processors, old references
to `update_results` have now been changed to `update_output`.

wa/framework/instrumentation.py

@@ -38,8 +38,8 @@ Hence, the following methods are sufficient to implement to add new instrument:
        where instrument measures start being registered/taken.
     - stop: It is invoked just after the workload execution stops. The measures
        should stop being taken/registered.
-    - update_result: It is invoked after the workload updated its result.
-       update_result is where the taken measures are added to the result so it
+    - update_output: It is invoked after the workload updated its result.
+       update_output is where the taken measures are added to the output so it
        can be processed by Workload Automation.
     - teardown is invoked after the workload is teared down. It is a good place
        to clean any logs generated by the instrument.
@@ -76,13 +76,13 @@ stop method::
     def stop(self, context):
         self.device.execute('{} stop'.format(self.trace_on_device))
 
-The generated result can be updated inside update_result, or if it is trace, we
-just pull the file to the host device. context has a result variable which
+The generated output can be updated inside update_output, or if it is trace, we
+just pull the file to the host device. context has an output variable which
 has add_metric method. It can be used to add the instrumentation results metrics
 to the final result for the workload. The method can be passed 4 params, which
 are metric key, value, unit and lower_is_better, which is a boolean. ::
 
-    def update_result(self, context):
+    def update_output(self, context):
         # pull the trace file to the device
         result = os.path.join(self.device.working_directory, 'trace.txt')
         self.device.pull(result, context.working_directory)
@@ -127,7 +127,7 @@ SIGNAL_MAP = OrderedDict([
     ('start', signal.BEFORE_WORKLOAD_EXECUTION),
     ('stop', signal.AFTER_WORKLOAD_EXECUTION),
     ('process_workload_output', signal.SUCCESSFUL_WORKLOAD_OUTPUT_UPDATE),
-    ('update_result', signal.AFTER_WORKLOAD_OUTPUT_UPDATE),
+    ('update_output', signal.AFTER_WORKLOAD_OUTPUT_UPDATE),
     ('teardown', signal.AFTER_WORKLOAD_TEARDOWN),
     ('finalize', signal.RUN_FINALIZED),
 
@@ -321,7 +321,7 @@ def install(instrument, context):
             raise ValueError(message.format(attr_name, arg_num))
 
         priority = get_priority(attr)
-        logger.debug('\tConnecting %s to %s with priority %s(%d)', attr.__name__, 
+        logger.debug('\tConnecting %s to %s with priority %s(%d)', attr.__name__,
                      SIGNAL_MAP[attr_name], priority.name, priority.value)
 
         mc = ManagedCallback(instrument, attr)