Make more API limitations configurable

[abitmore]

User Story
These should have been included in #782 .

• lookup_accounts
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1038 in 3eae654

  FC_ASSERT( limit <= 1000 );

• lookup_witness_accounts
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1791 in 3eae654

  FC_ASSERT( limit <= 1000 );

• lookup_committee_member_accounts
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1867 in 3eae654

  FC_ASSERT( limit <= 1000 );

• lookup_vote_ids
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1965 in 3eae654

  FC_ASSERT( votes.size() < 1000, "Only 1000 votes can be queried at a time" );

• get_account_limit_orders
  

  bitshares-core/libraries/app/database_api.cpp

  Line 803 in fb657f6

  FC_ASSERT( limit <= 101 );

• list_assets
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1213 in fb657f6

  FC_ASSERT( limit <= 101 );

• get_collateral_bids
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1365 in fb657f6

  FC_ASSERT( limit <= 100 );

  BTW this code is inefficient:
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1376 in fb657f6

  while( skip-- > 0 && start != end ) { ++start; }

• get_top_markets
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1532 in fb657f6

  FC_ASSERT( limit <= 100 );

• get_trade_history
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1570 in fb657f6

  FC_ASSERT( limit <= 100 );

• get_trade_history_by_sequence
  

  bitshares-core/libraries/app/database_api.cpp

  Line 1661 in fb657f6

  FC_ASSERT( limit <= 100 );

• get_withdraw_permissions_by_giver
  

  bitshares-core/libraries/app/database_api.cpp

  Line 2348 in fb657f6

  FC_ASSERT( limit <= 101 );

• get_withdraw_permissions_by_recipient
  

  bitshares-core/libraries/app/database_api.cpp

  Line 2370 in fb657f6

  FC_ASSERT( limit <= 101 );

• get_full_accounts
  

  bitshares-core/libraries/app/database_api.cpp

  Line 900 in 3eae654

  if(_subscribed_accounts.size() < 100) {

Impacts
Describe which portion(s) of BitShares Core may be impacted by your request. Please tick at least one box.

• API (the application programming interface)
• Build (the build process or something prior to compiled code)
• CLI (the command line wallet)
• Deployment (the deployment process after building such as Docker, Travis, etc.)
• DEX (the Decentralized EXchange, market engine, etc.)
• P2P (the peer-to-peer network for transaction/block propagation)
• Performance (system or user efficiency, etc.)
• Protocol (the blockchain logic, consensus, validation, etc.)
• Security (the security of system or user data, etc.)
• UX (the User Experience)
• Other (please add below)

Additional Context (optional)
Add any other context about your request here.

CORE TEAM TASK LIST

• Evaluate / Prioritize Feature Request
• Refine User Stories / Requirements
• Define Test Cases
• Design / Develop Solution
• Perform QA/Testing
• Update Documentation

[manikey123]

Resuming on this ticket

[pmconrad]

All done AFAICS