do not use artifacts at sahara files

we migrated these files to tarballs.opentack.org

Change-Id: I6f73820136af7277291749292c328693f89c3715

sahara/plugins/cdh/config_helper.py

@@ -51,7 +51,9 @@ class ConfigHelper(object):
         '/apache/hadoop/hadoop-openstack/2.3.0-cdh5.0.0'
         '/hadoop-openstack-2.3.0-cdh5.0.0.jar')
 
-    DEFAULT_EXTJS_LIB_URL = 'http://sahara-files.mirantis.com/ext-2.2.zip'
+    DEFAULT_EXTJS_LIB_URL = (
+        'http://tarballs.openstack.org/sahara/dist/common-artifacts/'
+        'ext-2.2.zip')
 
     SWIFT_LIB_URL = p.Config(
         'Hadoop OpenStack library URL', 'general', 'cluster', priority=1,

sahara/plugins/kerberos.py

@@ -70,7 +70,8 @@ admin_password = _config(
     name='Admin password', config_type='string', default_value='')
 policy_url = _config(
     name="JCE libraries", config_type='string',
-    default_value='http://sahara-files.mirantis.com/kerberos-artifacts',
+    default_value=('http://tarballs.openstack.org/sahara/dist/'
+                   'common-artifacts/'),
     description=_('Java Cryptography Extension (JCE) '
                   'Unlimited Strength Jurisdiction Policy Files location')
 )

sahara/tests/unit/plugins/cdh/base_plugin_utils_test.py

@@ -250,7 +250,8 @@ class TestPluginUtils(b.SaharaTestCase):
             calls = [mock.call('ls /var/lib/oozie/ext-2.2',
                                raise_when_error=False),
                      mock.call("curl -L -o '/var/lib/oozie/extjs.zip'"
-                               " http://sahara-files.mirantis.com/ext-2.2.zip",
+                               " http://tarballs.openstack.org/sahara/dist/"
+                               "common-artifacts/ext-2.2.zip",
                                run_as_root=True),
                      mock.call('unzip /var/lib/oozie/extjs.zip'
                                ' -d /var/lib/oozie',