tempest: Obey ssh_timeout config option

The patch creates a new in-tree class that overrides default value for
tempest ssh.Client to the one defined by ssh_timeout config option.

Change-Id: I418519866e3cbd486fe0ffec23e1553ea0891420
diff --git a/neutron/tests/tempest/common/ssh.py b/neutron/tests/tempest/common/ssh.py
new file mode 100644
index 0000000..095a12d
--- /dev/null
+++ b/neutron/tests/tempest/common/ssh.py
@@ -0,0 +1,24 @@
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.lib.common import ssh
+
+from neutron.tests.tempest import config
+
+
+class Client(ssh.Client):
+    def __init__(self, *args, **kwargs):
+        if 'timeout' not in kwargs:
+            kwargs['timeout'] = config.CONF.validation.ssh_timeout
+        super(Client, self).__init__(*args, **kwargs)