Istio ingress installation kustomize bug.

[moabu]

Describe the bug

Traceback (most recent call last):
  File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "./pygluu-kubernetes.pyz/__main__.py", line 3, in <module>
  File "./pygluu-kubernetes.pyz/_bootstrap/__init__.py", line 179, in bootstrap
  File "./pygluu-kubernetes.pyz/_bootstrap/__init__.py", line 33, in run
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/pygluu/kubernetes/create.py", line 91, in main
    kustomize.install()
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/pygluu/kubernetes/kustomize.py", line 1510, in install
    self.kustomize_it()
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/pygluu/kubernetes/kustomize.py", line 606, in kustomize_it
    self.adjust_istio_virtual_services_destination_rules(app, "gluu-istio-oxauth")
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/pygluu/kubernetes/kustomize.py", line 492, in adjust_istio_virtual_services_destination_rules
    "DestinationRule", destination_rule_name)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/pygluu/kubernetes/yamlparser.py", line 48, in __init__
    self.yaml.dump(self.modify_dict, file)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/ruamel/yaml/main.py", line 451, in dump
    return self.dump_all([data], stream, _kw, transform=transform)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/ruamel/yaml/main.py", line 465, in dump_all
    self._context_manager.dump(data)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/ruamel/yaml/main.py", line 817, in dump
    self._yaml.representer.represent(data)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/ruamel/yaml/representer.py", line 85, in represent
    node = self.represent_data(data)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/ruamel/yaml/representer.py", line 122, in represent_data
    node = self.yaml_representers[None](self, data)
  File "/root/.shiv/pygluu-kubernetes_3a594ed9e34de5dcfc2dd9c5514c0aed5bb5fe983ee41a5d1b4e818dc8724b47/site-packages/ruamel/yaml/representer.py", line 393, in represent_undefined
    raise RepresenterError('cannot represent an object: %s' % (data,))
ruamel.yaml.representer.RepresenterError: cannot represent an object: <class 'dict'>

Bug occurs because code executes parsing yamls before building process ends.