Revert "Pluggable consensus consistency model"

[lebdron]

Reverts hyperledger-iroha/iroha#2091
irohad crashes with segmentation fault in Release build.

[2019-02-19 10:31:53.782913594][th:20536][info] IROHAD ===> iroha initialized
[2019-02-19 10:31:53.784721051][th:20536][info] OnDemandOrderingServiceImpl onCollaborationOutcome => Round: [block=2, reject=0, ]
[2019-02-19 10:31:53.785207214][th:20536][warning] OnDemandOsClientGrpc RPC failed: Connect Failed
[2019-02-19 10:31:53.785741016][th:20536][info] YAC Order for voting: {0.0.0.0:10002, 0.0.0.0:10003, 0.0.0.0:10004, 0.0.0.0:10001}
[2019-02-19 10:31:53.785852425][th:20536][info] YAC Vote for round Round: [block=2, reject=0, ], hash (, ) to peer Peer: [address=0.0.0.0:10002, pubkey=Publi
cKey: [f35dd82e662c816e2b40ca1226c7261f0d509cdbc2fae8cfa019a8a2c179de69 ], ]
[2019-02-19 10:31:53.785958654][th:20536][info] AsyncGrpcClient Send votes bundle[size=1] to 0.0.0.0:10002
[2019-02-19 10:31:53.786103514][th:20536][info] IROHAD ~~~~~~~~~| PROPOSAL ^_^ |~~~~~~~~~
[2019-02-19 10:31:53.786109062][th:20539][warning] AsyncGrpcClient RPC failed: Connect Failed
[2019-02-19 10:31:58.786232905][th:20544][info] YAC Vote for round Round: [block=2, reject=0, ], hash (, ) to peer Peer: [address=0.0.0.0:10003, pubkey=Publi
cKey: [062f35151edf723f94b8a6d2a3c9d13d6547725ef0383970503079efe3f9c715 ], ]
[2019-02-19 10:31:58.786675927][th:20544][info] AsyncGrpcClient Send votes bundle[size=1] to 0.0.0.0:10003
[2019-02-19 10:31:58.787123437][th:20539][warning] AsyncGrpcClient RPC failed: Connect Failed
[2019-02-19 10:32:03.786816911][th:20546][info] YAC Vote for round Round: [block=2, reject=0, ], hash (, ) to peer Peer: [address=0.0.0.0:10004, pubkey=Publi
cKey: [310ad2f29059406941bc45d0556ac240d3bc29566c3b9808d8891bfdc91ab503 ], ]
[2019-02-19 10:32:03.787000917][th:20546][info] AsyncGrpcClient Send votes bundle[size=1] to 0.0.0.0:10004
[2019-02-19 10:32:03.787336035][th:20539][warning] AsyncGrpcClient RPC failed: Connect Failed
[2019-02-19 10:32:08.787195152][th:20547][info] YAC Vote for round Round: [block=2, reject=0, ], hash (, ) to peer Peer: [address=0.0.0.0:10001, pubkey=Publi
cKey: [a997cf89763661dade3a9d068be457b348401758bbc4a0104cf5071be1f69417 ], ]
[2019-02-19 10:32:08.787386369][th:20547][info] AsyncGrpcClient Send votes bundle[size=1] to 0.0.0.0:10001
[2019-02-19 10:32:08.788271276][th:20543][info] AsyncGrpcClient Receive votes[size=1] from ipv4:127.0.0.1:51660
[2019-02-19 10:32:08.788514347][th:20543][info] ProposalStorage Vote with Round: [block=2, reject=0, ] and hashes [, ] looks valid
[2019-02-19 10:32:08.788540674][th:20543][info] YacBlockStorage Vote with round Round: [block=2, reject=0, ] and hashes (, ) inserted, votes in storage [1/4]
Segmentation fault (core dumped)