Rename Marconi to Zaqar

Due to copyright issues Marconi is renamed to Zaqar. This patch updates
all Marconi references to Zaqar.

Change-Id: Ib37b95d99bbfc666e1a3a17174d87804ecd0649e
diff --git a/tempest/hacking/checks.py b/tempest/hacking/checks.py
index 93329bc..cef010e 100644
--- a/tempest/hacking/checks.py
+++ b/tempest/hacking/checks.py
@@ -20,7 +20,7 @@
 
 PYTHON_CLIENTS = ['cinder', 'glance', 'keystone', 'nova', 'swift', 'neutron',
                   'trove', 'ironic', 'savanna', 'heat', 'ceilometer',
-                  'marconi', 'sahara']
+                  'zaqar', 'sahara']
 
 PYTHON_CLIENT_RE = re.compile('import (%s)client' % '|'.join(PYTHON_CLIENTS))
 TEST_DEFINITION = re.compile(r'^\s*def test.*')