Make openstackci-beaker-ubuntu-trusty and logstash-filters non-voting

These are currently blocking things from landing in system-config.
Disable them for now, until somebody is able to fix them.

We should revert this commit.

Change-Id: I228fe9ff1185008d8f644817296028cadb0dc668
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

zuul.d/zuul-legacy-project-templates.yaml

@@ -835,12 +835,9 @@
       jobs:
         - legacy-logstash-filters-ubuntu-trusty:
             branches: master
+            voting: false
         - legacy-logstash-filters:
             voting: false
-    gate:
-      jobs:
-        - legacy-logstash-filters-ubuntu-trusty:
-            branches: master
 
 - project-template:
     name: infra-puppet-apply-jobs
@@ -851,7 +848,8 @@
             branches: master
         - legacy-infra-puppet-apply-3
         - legacy-openstackci-beaker-centos-7
-        - legacy-openstackci-beaker-ubuntu-trusty
+        - legacy-openstackci-beaker-ubuntu-trusty:
+            voting: false
         - legacy-openstackci-beaker:
             voting: false
     gate:
@@ -861,7 +859,6 @@
             branches: master
         - legacy-infra-puppet-apply-3
         - legacy-openstackci-beaker-centos-7
-        - legacy-openstackci-beaker-ubuntu-trusty
     experimental:
       jobs:
         - legacy-infra-puppet-apply-4-centos-7