disable ubuntu18-flannel test

.gitlab-ci.yml

@@ -375,17 +375,6 @@ gce_centos-weave-kubeadm-sep:
   except: ['triggers']
   only: [/^pr-.*$/]
 
-gce_ubuntu-flannel-ha:
-  stage: deploy-part2
-  <<: *job
-  <<: *gce
-  variables:
-    <<: *gce_variables
-    <<: *ubuntu_flannel_variables
-  when: on_success
-  except: ['triggers']
-  only: [/^pr-.*$/]
-
 ### MANUAL JOBS
 
 gce_ubuntu-weave-sep:
@@ -429,7 +418,6 @@ gce_centos7-flannel-addons-triggers:
   when: on_success
   only: ['triggers']
 
-
 gce_ubuntu-weave-sep-triggers:
   stage: deploy-part2
   <<: *job
@@ -483,6 +471,16 @@ gce_ubuntu-canal-kubeadm-triggers:
   when: on_success
   only: ['triggers']
 
+gce_ubuntu-flannel-ha:
+  stage: deploy-part2
+  <<: *job
+  <<: *gce
+  variables:
+    <<: *gce_variables
+    <<: *ubuntu_flannel_variables
+  when: manual
+  except: ['triggers']
+
 gce_centos-weave-kubeadm-triggers:
   stage: deploy-part2
   <<: *job