fix integration tests

The reasons of failures are following:

1. The change [0] is introduced in horizon, which removes unneeded
tags in production envs. This caused most failures.
2. HDP is removed from sahara codebase.
3. Sometimes unicode string 'None' is passed to saharaclient as input_id
or output_id of job. This string was translated to NoneType.

[0] https://review.openstack.org/#/c/287793

Co-Authored-by: Michael Ionkin <mionkin@mirantis.com>
Change-Id: I9cb0641b2b61a78a40b0e2c6faf2609f974088d2

sahara_dashboard/api/sahara.py

@@ -492,6 +492,10 @@ def job_get_configs(request, job_type):
 def job_execution_create(request, job_id, cluster_id,
                          input_id, output_id, configs,
                          interface, is_public=None, is_protected=None):
+    if input_id in [None, "", "None"]:
+        input_id = None
+    if output_id in [None, "", "None"]:
+        output_id = None
     return client(request).job_executions.create(
         job_id=job_id,
         cluster_id=cluster_id,

sahara_dashboard/test/integration_tests/pages/mixins.py

@@ -19,7 +19,6 @@ class TableCreateWithPluginMixin(object):
     PLUGIN_CHOOSE_FORM_FIELDS = (
         'vanilla_version',
         'cdh_version',
-        'hdp_version',
         'plugin_name',
         'spark_version',
         'fake_version',

tools/gate/integration/pre_test_hook.sh

@@ -4,3 +4,6 @@
 
 set -ex
 source commons $@
+
+cd /opt/stack/new/horizon/openstack_dashboard/local/local_settings.d
+mv _20_integration_tests_scaffolds.py.example _20_integration_tests_scaffolds.py