Gate: Tolerate failures in log collection tasks

This PS updates the gate tasks to tollerate failures in the post
run log collection tasks.

Change-Id: I8b982112955f4112e8107a7eae35680aa68c87ab
Signed-off-by: Pete Birley <pete@port.direct>

roles/gather-prom-metrics/tasks/main.yaml

@@ -28,6 +28,7 @@
           done
   args:
     executable: /bin/bash
+  ignore_errors: True
 
 - name: "Get prometheus metrics from tiller-deploy"
   shell: |-
@@ -35,6 +36,7 @@
           curl tiller-deploy.kube-system:44135/metrics >> "{{ logs_dir }}"/prometheus/kube-system-tiller-deploy.txt
   args:
     executable: /bin/bash
+  ignore_errors: True
 
 - name: "Downloads logs to executor"
   synchronize:

roles/helm-release-status/tasks/main.yaml

@@ -22,6 +22,7 @@
   args:
     executable: /bin/bash
   register: helm_releases
+  ignore_errors: True
 
 - name: "Gather get release status for helm charts"
   shell: |-