resultsdb: Show result log url in human mode

It would be nice to show result url in output.
ResultEvent class is not good for that because it is called too early,
and makes output looks ugly. Let's use Result.render hook which is
specially designed for this stage
Signed-off-by: NDmitry Monakhov <dmonakhov@openvz.org>

optional_plugins/resultsdb/avocado_resultsdb/__init__.py

@@ -23,13 +23,14 @@ import time
 import resultsdb_api
 from six import iteritems
 
-from avocado.core.plugin_interfaces import CLI, ResultEvents
+from avocado.core.plugin_interfaces import CLI, ResultEvents, Result
 from avocado.core.settings import settings
 from avocado.core import exceptions
 from avocado.utils import stacktrace
+from avocado.core.output import LOG_UI
 
 
-class ResultsdbResult(ResultEvents):
+class ResultsdbResultEvent(ResultEvents):
 
     """
     ResultsDB output class
@@ -142,6 +143,21 @@ class ResultsdbResult(ResultEvents):
         return 'NEEDS_INSPECTION'
 
 
+class ResultsdbResult(Result):
+
+    """
+    ResultsDB render class
+    """
+
+    name = 'resultsdb'
+    description = 'Resultsdb result support'
+
+    def render(self, result, job):
+        if getattr(job.args, 'resultsdb_logs', None) is not None:
+            LOG_UI.info("JOB URL    : %s/%s" % (job.args.resultsdb_logs,
+                                                os.path.basename(job.logdir)))
+
+
 class ResultsdbCLI(CLI):
 
     """

optional_plugins/resultsdb/setup.py

@@ -30,5 +30,8 @@ setup(name='avocado-framework-plugin-resultsdb',
               'resultsdb = avocado_resultsdb:ResultsdbCLI',
               ],
           'avocado.plugins.result_events': [
+              'resultsdb = avocado_resultsdb:ResultsdbResultEvent',
+              ],
+          'avocado.plugins.result': [
               'resultsdb = avocado_resultsdb:ResultsdbResult',
               ]})