[ABW]: added tests for get_discussions_by_created

...d/tavern/bridge_api_patterns/get_ranked_posts/_readme.txt

...e/get_comment_discussions_by_payout/under_limit.orig.json

...ve/get_comment_discussions_by_payout/under_limit.pat.json

...get_comment_discussions_by_payout/under_limit.tavern.yaml

...get_discussions_by_author_before_date/no_author.orig.json

.../get_discussions_by_author_before_date/no_author.pat.json

...t_discussions_by_author_before_date/no_author.tavern.yaml

...t_discussions_by_author_before_date/under_limit.orig.json

...et_discussions_by_author_before_date/under_limit.pat.json

...discussions_by_author_before_date/under_limit.tavern.yaml

...ser_api_negative/get_discussions_by_blog/no_tag.orig.json

...nser_api_negative/get_discussions_by_blog/no_tag.pat.json

...r_api_negative/get_discussions_by_blog/no_tag.tavern.yaml

...ve/get_discussions_by_blog/nonempty_filter_tags.orig.json

...ive/get_discussions_by_blog/nonempty_filter_tags.pat.json

.../get_discussions_by_blog/nonempty_filter_tags.tavern.yaml

...api_negative/get_discussions_by_blog/over_limit.orig.json

..._api_negative/get_discussions_by_blog/over_limit.pat.json

...i_negative/get_discussions_by_blog/over_limit.tavern.yaml

...pi_negative/get_discussions_by_blog/under_limit.orig.json