Description of problem:
Try to deploy Metrics 3.5 using Ansible, the job failed at
TASK [openshift_metrics : Stop Heapster] ***************************************
task path: /home/penli/work/src/github.com/penli1/tmp/openshift-ansible/roles/openshift_metrics/tasks/stop_metrics.yaml:13
fatal: [MASTER]: FAILED! => {
    "failed": true, 
    "msg": "'dict object' has no attribute 'stdout_lines'"
}

This might caused by:
1. the output of {{metrics_heapster_rc.stdout_lines}} have multiple vars when task running.
2. the pods are not running yet 

Version-Release number of selected component (if applicable):
openshift v3.5.0.7+390ef18
Metrics 3.5.0

How reproducible:
always

Steps to Reproduce:
1. prepare the inventory file

[oo_first_master]
$MASTER ansible_user=root ansible_ssh_user=root ansible_ssh_private_key_file="/home/penli/.ssh/libra.pem" openshift_public_hostname=$MASTER

[oo_first_master:vars]
deployment_type=openshift-enterprise
openshift_release=v3.5.0
openshift_metrics_install_metrics=true

openshift_metrics_hawkular_hostname=hawkular-metrics.$SUBDOMAIN
openshift_metrics_project=openshift-infra

openshift_metrics_image_prefix=registry.ops.openshift.com/openshift3/
openshift_metrics_image_version=3.5.0

2. git clone https://github.com/openshift/openshift-ansible.git (In this test, I'm using dev's branch  bz_1414477_missing_import_jks_deuce)
)

3. ansible-playbook -vvv -i ~/inventory   playbooks/common/openshift-cluster/openshift_metrics.yml

4. task fail and abort.

5. login the master machine and check the pod status
# oc get pod -n openshift-infra
NAME                         READY     STATUS    RESTARTS   AGE
hawkular-cassandra-1-br736   0/1       Running   0          1m
hawkular-metrics-hp7pj       0/1       Running   0          1m
heapster-g3rqr               0/1       Running   0          2m

6. wait for several minutes, pods are healthy and running.
# oc get pod -n openshift-infra
NAME                         READY     STATUS    RESTARTS   AGE
hawkular-cassandra-1-br736   1/1       Running   0          16m
hawkular-metrics-hp7pj       1/1       Running   0          17m
heapster-g3rqr               1/1       Running   0          17m

Expected results:
install successfully.

Additional info:
Ansible execution log and Events attached.