Add election_results to cycle data

The Jinja templates for formatting the election results expect an
'election_results' property to be loaded from the results yaml files to
generate election results.

There have been a few election cycles for PTLs now that have not needed
a election due to only having one candidate. In these cases, the yaml
files for the ptl results of those election cycles did not include the
empty 'election_results' property. This adds it to the missing data sets
to allow the docs job to pass.

Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>
Change-Id: I759b06a6b977299873ec8ab1f7e727d8b7071518

doc/source/results/ussuri/ptl.yaml

@@ -336,6 +336,8 @@ candidates:
     ircname: null
     url: https://git.openstack.org/cgit/openstack/election/plain/candidates/ussuri/Zun/feng.shengqin%40zte.com.cn
 election: ussuri
+elections_results: {}
+election_statistics: []
 leaderless:
 - Cyborg
 - Designate

doc/source/results/victoria/ptl.yaml

@@ -264,6 +264,8 @@ candidates:
     ircname: ''
     url: https://opendev.org/openstack/election/raw/branch/master/candidates/victoria/Zun/feng.shengqin%40zte.com.cn
 election: victoria
+elections_results: {}
+election_statistics: []
 leaderless:
 - Congress
 - Barbican

doc/source/results/xena/ptl.yaml

@@ -246,6 +246,8 @@ candidates:
     ircname: ''
     url: https://opendev.org/openstack/election/raw/branch/master/candidates/xena/Winstackers/lpetrut%40cloudbasesolutions.com
 election: xena
+elections_results: {}
+election_statistics: []
 leaderless:
 - Zaqar
 - Senlin