If index isn't found for meta - catch exception, WARN message

[jtaleric]

Instead of dumping the exception of index not found, catch, print a warning message, and continue.

+--------------+-------------------------+--------------------------------------+------------------------------------------------+
| ['pod_name'] |        metadata         | fa458c42-2f61-52f6-b403-a7676bdfa702 |                     value                      |
+--------------+-------------------------+--------------------------------------+------------------------------------------------+
|   pod_name   | backpack-fa458c42-nmwk9 |           value.Model name           | Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz |
|   pod_name   | backpack-fa458c42-nmwk9 |          value.Architecture          |                     x86_64                     |
|   pod_name   | backpack-fa458c42-nmwk9 |             value.CPU(s)             |                       2                        |
|   pod_name   | backpack-fa458c42-qq2qp |           value.Model name           | Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz |
|   pod_name   | backpack-fa458c42-qq2qp |          value.Architecture          |                     x86_64                     |
|   pod_name   | backpack-fa458c42-qq2qp |             value.CPU(s)             |                       2                        |
+--------------+-------------------------+--------------------------------------+------------------------------------------------+
+--------------+-------------------------+--------------------------------------+------------+
| ['pod_name'] |        metadata         | fa458c42-2f61-52f6-b403-a7676bdfa702 |   value    |
+--------------+-------------------------+--------------------------------------+------------+
|   pod_name   | backpack-fa458c42-nmwk9 |            value.MemTotal            | 7934444 kB |
|   pod_name   | backpack-fa458c42-qq2qp |            value.MemTotal            | 7934444 kB |
+--------------+-------------------------+--------------------------------------+------------+
Traceback (most recent call last):
  File "/home/jtaleric/dev/benchmark-comparison/demo/bin/touchstone_compare", line 33, in <module>
    sys.exit(load_entry_point('touchstone==0.0.0', 'console_scripts', 'touchstone_compare')())
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/touchstone-0.0.0-py3.10.egg/touchstone/compare.py", line 244, in render
    main(sys.argv[1:])
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/touchstone-0.0.0-py3.10.egg/touchstone/compare.py", line 153, in main
    database_instance.get_metadata(uuid, metadata_search_map[index], index, metadata_dict)
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/touchstone-0.0.0-py3.10.egg/touchstone/databases/elasticsearch.py", line 142, in get_metadata
    response = s.execute()
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch_dsl-7.3.0-py3.10.egg/elasticsearch_dsl/search.py", line 715, in execute
    self, es.search(index=self._index, body=self.to_dict(), **self._params)
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch-7.13.4-py3.10.egg/elasticsearch/client/utils.py", line 168, in _wrapped
    return func(*args, params=params, headers=headers, **kwargs)
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch-7.13.4-py3.10.egg/elasticsearch/client/__init__.py", line 1670, in search
    return self.transport.perform_request(
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch-7.13.4-py3.10.egg/elasticsearch/transport.py", line 415, in perform_request
    raise e
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch-7.13.4-py3.10.egg/elasticsearch/transport.py", line 381, in perform_request
    status, headers_response, data = connection.perform_request(
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch-7.13.4-py3.10.egg/elasticsearch/connection/http_urllib3.py", line 277, in perform_request
    self._raise_error(response.status, raw_data)
  File "/home/jtaleric/dev/benchmark-comparison/demo/lib64/python3.10/site-packages/elasticsearch-7.13.4-py3.10.egg/elasticsearch/connection/base.py", line 330, in _raise_error
    raise HTTP_EXCEPTIONS.get(status_code, TransportError)(
elasticsearch.exceptions.NotFoundError: NotFoundError(404, 'index_not_found_exception', 'no such index [k8s_cluster_info-metadata]', k8s_cluster_info-metadata, index_or_alias)