Remove omit from template resource (#432)

Remove ``omit`` value from template args

SUMMARY

While defining resource using template parameter, the code does not remove the omit value if any.
This fix adds a post process to remove any omit value from the resource definition.
fixes #431

ISSUE TYPE


Bugfix Pull Request

COMPONENT NAME

k8s*

Reviewed-by: Mike Graves <mgraves@redhat.com>
Reviewed-by: Abhijeet Kasurde <None>

tests/integration/targets/k8s_template/templates/configmap.yml.j2

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+    annotations:
+        description: "{{ k8s_configmap_desc | default(omit) }}"
+data:
+    key: "testing-template"