supplemented tests for other groups touched before

[ABW]: added tests for get_post_discussions_by_payout, get_discussions_by_promoted and get_comment_discussions_by_payout
since those routines now reuse bridge_api SQL functions some functionality changed slightly (mostly more checks)
merge with some version of master (now old)

more bridge api tests

See merge request !137

one test pattern was incorrect - accepted change that needs to be investigated (test is failing)

Merge branch 'pmaniora_more_bridge_api_tests' of gitlab.syncad.com:hive/tests_api into pmaniora_more_bridge_api_tests

Merge branch 'readme_condenser_api' of https://gitlab.syncad.com/hive/tests_api into readme_condenser_api

Merge branch 'readme_condenser_api' of https://gitlab.syncad.com/hive/tests_api into readme_condenser_api

corrected some tests that were not testing what they were meant to be
supplemented tests for get_blog/get_blog_entries
deleted test for check that is no longer performed (replaced with error recovery)

Merge branch 'readme_condenser_api' of https://gitlab.syncad.com/hive/tests_api into readme_condenser_api

fixes for more deterministic mentions

See merge request !149

Mi update tests for mentions

See merge request !146

Due to make deterministic order of mentions indices of notifications
for mentions have changed.

The call `get_state` - additional pattern

See merge request !145

Merge branch 'pmaniora_more_bridge_api_tests' of gitlab.syncad.com:hive/tests_api into pmaniora_more_bridge_api_tests

[ABW]: fixed error code (previously used was in reserved pool)

See merge request !144

[ABW]: supplemented missing .orig files for new tests

See merge request !143

Tests for changes in get_content negative response

See merge request !141

added new negative tests for get_content and get_content_replies to cover cases of nonexisting, deleted post and deleted many times
added positive test for post deleted many times but recreated

Fixed tests for decentralized blacklists

See merge request !138

pattenrns tests for notifications

See merge request !140