- updated tests bodies,
- added benchmarks for some API,

More test and benchmarks in next commit.

- added initial implementation for tests using pyresttest framework
  * note: test have no arguments added so they will not work,
    arguments will be added in next commit
- fixes in imports in "manual" tests
- program for calling enum_virtual_ops added to test timeout issues
  for given block range. Timeout issues were reported by Gandalf.

Fix for situation when len(values) is 0. Before fix it will result with
malformed insert query with empty values vector.

- process_hive_post_operation will return post_category,
- post_category will be used to set initial post tag,
- post_category a parent category if parent_author exists
  or parent_permlingif parent_author does not exists.

 Conflicts resolved:
	hive/server/condenser_api/cursor.py
	hive/server/condenser_api/methods.py
	hive/utils/stats.py

Applied account_history_api::enum_virtual_ops new capabilities

See merge request blocktrades/hivemind!7

Merge branch 'dk-issue-3-filtered-vops' of gitlab.syncad.com:blocktrades/hivemind into dk-issue-3-filtered-vops

 Conflicts:
	hive/steem/client.py

- removed "limit":1000 option in enum_virtual_ops call (limit was
  causing trimming ops)
- fixed some syntax errors

Preliminary version using filters in enum_virtual_ops. Some strange porblems occured related to missing payout in comment_reward_operation.

  * added query limit to avoid SQL overflow errors,
  * fixed inefficient insert query, pervious was using selects for each row,
- In apis:
  * subqueries were changed to inner joins

CRITICAL FIX: escaping routine was invalid causing empty values in hive_post_data. Body for get_active_votes

Removed track_tx: it was causing missing COMMIT for START TRANSACTION error. Improved keyboard interruption. Added missing APIs: with placeholders but it will be filled with proper methods. Other minor fixes.

Support for comment_options_operation, percent_steem_dollars renamed to percent_hbd, changed some defaults in schemas, removed percent_steem_dollars column from hive_posts

- Fixed handling of KeyboardInterrupt

- Fixed generation of votes insertion query (missing limit so query exceeded SQL limit). Also simplified SQL code
- comment_payout_op is done via grouped UPDATE query to improve sync performance
- follow insert is done via grouped UPDATE query to improve sync performance
- Implemented statistics gathering for each processed block to print number of processed operations
- virtual ops are prepared in its dedicated thread to improve sync performance
- Added printing of total execution time of sync, at each block-range report.

Merge branch 'dk-issue-3-concurrent-block-query' of gitlab.syncad.com:blocktrades/hivemind into dk-issue-3-concurrent-block-query

Merge branch 'dk-issue-3-concurrent-block-query' of gitlab.syncad.com:blocktrades/hivemind into dk-issue-3-concurrent-block-query

Merge branch 'dk-issue-3-concurrent-block-query' of gitlab.syncad.com:blocktrades/hivemind into dk-issue-3-concurrent-block-query

Resolved Conflicts:
	hive/indexer/posts.py

Simplified queries related to votes processing. Still is needed unification to have one insertion path using ON CONFLICT extension

WIP: Implemented concurrent fetching of blocks and vops to avoid blocking operation processing during API calls.