Add tenant support to zuul client

Here we are adding tenant support and re-enabling unit tests for
enqueue and promote.

Change-Id: I384128b9b14be1dc3c4a0c914dcaf13d30f1792f
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
diff --git a/doc/source/client.rst b/doc/source/client.rst
index 5fe2252..6b62360 100644
--- a/doc/source/client.rst
+++ b/doc/source/client.rst
@@ -28,7 +28,7 @@
 
 Example::
 
-  zuul enqueue --trigger gerrit --pipeline check --project example_project --change 12345,1
+  zuul enqueue --tenant openstack --trigger gerrit --pipeline check --project example_project --change 12345,1
 
 Note that the format of change id is <number>,<patchset>.
 
@@ -38,7 +38,7 @@
 
 Example::
 
-  zuul promote --pipeline check --changes 12345,1 13336,3
+  zuul promote --tenant openstack --pipeline check --changes 12345,1 13336,3
 
 Note that the format of changes id is <number>,<patchset>.