Merge branch 'abw_mock_cleanup' into 'develop'

...db/sql_scripts/bridge_get_ranked_post_for_communities.sql

hive/db/sql_scripts/bridge_list_communities.sql

hive/db/sql_scripts/bridge_list_community_roles.sql

hive/db/sql_scripts/db_upgrade.sh

hive/db/sql_scripts/utility_functions.sql

hive/indexer/accounts.py

hive/indexer/blocks.py

hive/indexer/community.py

hive/indexer/follow.py

hive/indexer/mock_block_provider.py

hive/indexer/posts.py

hive/indexer/sync.py

hive/server/common/helpers.py

hive/server/hive_api/community.py

hive/steem/block/schedule.py

hive/steem/blocks_provider.py

hive/steem/client.py

hive/steem/vops_provider.py

mock_data/block_data/community_op/flow.txt

...ta/block_data/community_op/mock_block_data_community.json