Initial integ tests

[HenryL27]

This PR should make it easy to write integration tests for processors. Simply

# swap out "debug" for whatever configured processor/pipeline you want to test
@pytest.mark.processor_name("debug")
def test_debug(opensearch_client, upload_jsonl_index, singleton_pipeline):
    # Test code goes here
    # opensearch_client is an opensearchpy OpenSearch object pointing to the OS container
    # upload_jsonl_index is the name of the loaded index
    # singleton_pipeline is the name of the search pipeline

[alexaryn]

Blast from the past!

[alexaryn]

Just gonna trust you...