Updates after "not found ballot boxes" on voting

[greenhat]

Close #291

Node scan for ballot token returns boxes.

Confirmed that ballot boxes from the previous update have different ergo tree (with previous update nft) due to the update process copying ergo tree from vote ballot boxes.

Todo: - check the ballot box wrapper filters out boxes because of different ergo tree than in pool_config.yaml;

• [x] use ballot contract from updated pool config in update-pool command;
• [x] relax *BoxWrapper loading checks to accept boxes with "old" contracts;
• [x] restore update-pool to use update and ballot contracts from inputs in the outputs (there is a clause in both update and ballot contracts requiring the contract to remain unchanged);
• [x] confirm ballot contract change before merging since vote command takes ballot contract from the pool config in anticipation that ballot contract will be changed - https://github.com/ergoplatform/eips/pull/41/files#r1243427074

[coveralls]

Pull Request Test Coverage Report for Build 5399582068

• 29 of 54 (53.7%) changed or added relevant lines in 6 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.3%) to 54.843%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core/src/cli_commands/update_pool.rs	1	2	50.0%
core/src/box_kind/ballot_box.rs	5	7	71.43%
core/src/cli_commands/vote_update_pool.rs	21	32	65.63%
core/src/main.rs	0	11	0.0%
<!--	Total:	29	54	53.7%	-->

Files with Coverage Reduction	New Missed Lines	%
core/src/box_kind/ballot_box.rs	1	86.17%
core/src/cli_commands/vote_update_pool.rs	1	54.44%
<!--	Total:	2		-->

Totals
Change from base Build 5334019994:	-0.3%
Covered Lines:	2061
Relevant Lines:	3758

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💛 - Coveralls