Align filter params for deployment history command

After the commit c179e5d0b4b8a5b4566120eceb81a1d0ed9577c8
GET request to Nailgun should not contain parameters
with empty values, e.g. /?param=&param1=&param2.
This patch aligns 'fuel2 task history show' command
execution removing empty parameters from GET requet

Change-Id: I04f02767c45691dc4345bd73d1cc3fb3d7bd4852
Closes-Bug: 1610177
(cherry picked from commit ec2ed50acb)

fuelclient/tests/unit/v1/test_deployment_history_action.py

@@ -95,9 +95,7 @@ class TestDeploymentTasksAction(base.UnitTestCase):
     def test_show_history_for_special_nodes(self):
         self.m_history_api = self.m_request.get(
             '/api/v1/transactions/1/deployment_history/?'
-            'nodes=1,2&'
-            'statuses=&'
-            'tasks_names=',
+            'nodes=1,2',
             json={})
 
         self.execute(
@@ -110,8 +108,6 @@ class TestDeploymentTasksAction(base.UnitTestCase):
     def test_show_history_for_special_tasks(self):
         self.m_history_api = self.m_request.get(
             '/api/v1/transactions/1/deployment_history/?'
-            'nodes=&'
-            'statuses=&'
             'tasks_names=test1,test2',
             json={})
 
@@ -125,9 +121,7 @@ class TestDeploymentTasksAction(base.UnitTestCase):
     def test_show_history_with_special_statuses(self):
         self.m_history_api = self.m_request.get(
             '/api/v1/transactions/1/deployment_history/?'
-            'nodes=&'
-            'statuses=ready,skipped&'
-            'tasks_names=',
+            'statuses=ready,skipped',
             json={})
         self.execute(
             ['fuel', 'deployment-tasks', '--tid', '1',

fuelclient/tests/unit/v2/lib/test_deployment_history.py

@@ -35,9 +35,8 @@ class TestDeploymentHistoryFacade(test_api.BaseLibTest):
         self.client = fuelclient.get_client('deployment_history', self.version)
 
     def get_url(self, nodes='', statuses='', tasks_names=''):
-        return self.res_uri + '?nodes={}&statuses={}&tasks_names={}'.format(
-            nodes, statuses, tasks_names
-        )
+        params = '?nodes={}&statuses={}&tasks_names={}'
+        return self.res_uri + params.format(nodes, statuses, tasks_names)
 
     def test_deployment_history_list(self):
 

fuelclient/v1/deployment_history.py

@@ -23,9 +23,7 @@ from fuelclient.v1 import base_v1
 
 class DeploymentHistoryClient(base_v1.BaseV1Client):
 
-    class_api_path = "transactions/{transaction_id}/deployment_history/" \
-                     "?nodes={nodes}&statuses={statuses}" \
-                     "&tasks_names={tasks_names}"
+    class_api_path = "transactions/{transaction_id}/deployment_history/"
 
     history_records_keys = ("task_name", "node_id", "status",
                             "time_start", "time_end")
@@ -40,15 +38,17 @@ class DeploymentHistoryClient(base_v1.BaseV1Client):
             'nodes': nodes,
             'tasks_names': tasks_names
         }
+        # remove unused parameters or parameters with empty list as value
+        parameters = {k: v for k, v in six.iteritems(parameters)
+                      if v is not None and v}
+        # 'parameters': ['param1', 'param2'] --> 'parameters': 'param1,param2'
         for k in parameters:
-            parameters[k] = ",".join(str(s) for s in parameters[k]) \
-                if parameters[k] else ""
+            parameters[k] = ",".join(s for s in parameters[k])
 
         history_with_tasks = APIClient.get_request(
             self.class_api_path.format(
                 transaction_id=transaction_id,
-                **parameters
-            )
+            ), params=parameters
         )
         # rename legacy field for Fuel 9.0
         for record in history_with_tasks: