Description of problem:
When setting kubeconfig with relative path, run wsu ansible playbook will fail in TASK [Check for bootstrap CSR].

Version-Release number of selected component (if applicable):
# oc get clusterversion
NAME      VERSION                             AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.3.0-0.nightly-2019-11-29-051144   True        False         6h57m   Cluster version is 4.3.0-0.nightly-2019-11-29-051144
# git show
commit 22f339a49465138862a490adc632fb11ce62cb20

How reproducible:
always

Steps to Reproduce:
1. Install OCP 4.3 cluster with ovn-kubernetes

2. Set KUBECONFIG with relative path
# export KUBECONFIG=kubeconfig-72923

3. Create windows instance with wni
# ./wni azure create --kubeconfig kubeconfig-72923 --credentials ~/.azure/osServicePrincipal.json --image-id MicrosoftWindowsServer:WindowsServer:2019-Datacenter-with-Containers:latest --instance-type Standard_D2s_v3

4. Run wsu ansible playbook

Actual results:
Ansible run succeed.

Expected results:
Ansible run failed, oc command can not find kubeconfig file.

# ansible-playbook -i hosts ~/go/src/windows-machine-config-operator/tools/ansible/tasks/wsu/main.yaml -v
...
TASK [Check for bootstrap CSR] ******
FAILED - RETRYING: Check for bootstrap CSR (2 retries left).
FAILED - RETRYING: Check for bootstrap CSR (1 retries left).
fatal: [13.67.137.145 -> localhost]: FAILED! => {"attempts": 2, "changed": true, "cmd": "oc get csr | awk '/system:serviceaccount:openshift-machine-config-operator:node-bootstrapper/ && /Pending/ {print $1}'", "delta": "0:00:00.103710", "end": "2019-12-02 18:25:35.516440", "rc": 0, "start": "2019-12-02 18:25:35.412730", "stderr": "error: Missing or incomplete configuration info.  Please login or point to an existing, complete config file:\n\n  1. Via the command-line flag --config\n  2. Via the KUBECONFIG environment variable\n  3. In your home directory as ~/.kube/config\n\nTo view or setup config directly use the 'config' command.", "stderr_lines": ["error: Missing or incomplete configuration info.  Please login or point to an existing, complete config file:", "", "  1. Via the command-line flag --config", "  2. Via the KUBECONFIG environment variable", "  3. In your home directory as ~/.kube/config", "", "To view or setup config directly use the 'config' command."], "stdout": "", "stdout_lines": []}


Additional info:
This issue is caused by ansible "delegate_to" module, seems like when using "delegate_to: localhost", working directory changed to ansible playbook folder, such as: /root/go/src/windows-machine-config-operator/tools/ansible/tasks/wsu, so all oc command will fail in the play book.