Update contributor guide for Xena

Change-Id: I6415e6d62eabf4c178dc3ac0a2f606403b44ebe8
Signed-off-by: Takashi Natsume <takanattie@gmail.com>

doc/source/contributor/how-to-get-involved.rst

@@ -261,7 +261,7 @@ reviews:
 -  Where do I start? What should I review?
 
    -  There are various tools, but a good place to start is:
-      https://etherpad.openstack.org/p/nova-runways-wallaby
+      https://etherpad.openstack.org/p/nova-runways-xena
    -  Depending on the time in the cycle, it's worth looking at
       NeedsCodeReview blueprints:
       https://blueprints.launchpad.net/nova/
@@ -323,7 +323,7 @@ becoming a member of nova-core.
 How to do great nova-spec reviews?
 ==================================
 
-https://specs.openstack.org/openstack/nova-specs/specs/wallaby/template.html
+https://specs.openstack.org/openstack/nova-specs/specs/xena/template.html
 
 :doc:`/contributor/blueprints`.
 

doc/source/contributor/process.rst

@@ -36,8 +36,8 @@ If you are new to Nova, please read this first: :ref:`getting_involved`.
 Dates overview
 ==============
 
-For Wallaby, please see:
-https://wiki.openstack.org/wiki/Nova/Wallaby_Release_Schedule
+For Xena, please see:
+https://wiki.openstack.org/wiki/Nova/Xena_Release_Schedule
 
 .. note:: Throughout this document any link which references the name of a
           release cycle in the link can usually be changed to the name of the
@@ -102,9 +102,9 @@ Why we have a Spec Freeze:
 
 By the freeze date, we expect all blueprints that will be approved for the
 cycle to be listed on launchpad and all relevant specs to be merged.
-For Wallaby, blueprints can be found at
-https://blueprints.launchpad.net/nova/wallaby and specs at
-https://specs.openstack.org/openstack/nova-specs/specs/wallaby/index.html
+For Xena, blueprints can be found at
+https://blueprints.launchpad.net/nova/xena and specs at
+https://specs.openstack.org/openstack/nova-specs/specs/xena/index.html
 
 Starting with Liberty, we are keeping a backlog open for submission at all
 times.