get_discussions_by_blog move to folder

hivemind/tavern/pytest.ini

...api_patterns/get_discussions_by_blog/author_tag.orig.json

..._api_patterns/get_discussions_by_blog/author_tag.pat.json

...i_patterns/get_discussions_by_blog/author_tag.tavern.yaml

...n/tags_api_patterns/get_discussions_by_blog/tag.orig.json

...rn/tags_api_patterns/get_discussions_by_blog/tag.pat.json

...tags_api_patterns/get_discussions_by_blog/tag.tavern.yaml

..._api_patterns/get_discussions_by_blog/tag_limit.orig.json

...s_api_patterns/get_discussions_by_blog/tag_limit.pat.json

...pi_patterns/get_discussions_by_blog/tag_limit.tavern.yaml