[shiftstack]add missing kubeconfig param

... and load .bashrc whle running the ansible-navigator. That's needed
for reading the envvars that will be used for writting the junit report.

roles/shiftstack/tasks/pre_test_shiftstack.yml

@@ -21,6 +21,7 @@
 
 - name: Remove the shiftstackclient pod if exists
   kubernetes.core.k8s:
+    kubeconfig: "{{ cifmw_openshift_kubeconfig }}"
     state: absent
     api_version: v1
     kind: Pod

roles/shiftstack/tasks/test_config.yml

@@ -31,6 +31,7 @@
         namespace: "{{ cifmw_shiftstack_client_pod_namespace }}"
         pod_name: "{{ cifmw_shiftstack_client_pod_name }}"
         command: >-
+          source .bashrc &&
           cd shiftstack-qa &&
           ansible-navigator run playbooks/{{ cifmw_shiftstack_run_playbook }} -e @jobs_definitions/{{ testconfig }} -e ocp_cluster_name={{ cifmw_shiftstack_cluster_name }} -e user_cloud={{ cifmw_shiftstack_project_name }}
       ansible.builtin.include_tasks: exec_command_in_pod.yml