WIP: reusing code of bridge calls in condenser_api

hive/db/schema.py

hive/db/sql_scripts/bridge_get_ranked_post_for_all.sql

hive/db/sql_scripts/bridge_get_ranked_post_for_tag.sql

...l_scripts/condenser_get_comment_discussions_by_payout.sql

.../db/sql_scripts/condenser_get_discussions_by_promoted.sql

.../sql_scripts/condenser_get_post_discussions_by_payout.sql

hive/server/bridge_api/methods.py

hive/server/condenser_api/methods.py

tests/tests_api