fix: canRule false for juror who missed vote

[satello]

If a juror misses their vote it should not show canRule in same session

[coveralls]

Pull Request Test Coverage Report for Build 713

• 0 of 3 (0.0%) changed or added relevant lines in 1 file are covered.
• 131 unchanged lines in 6 files lost coverage.
• Overall coverage decreased (-13.5%) to 39.636%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/contracts/implementations/arbitrator/KlerosPOC.js	0	3	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/contracts/ContractImplementation.js	1	81.43%
src/utils/Web3Wrapper.js	4	20.83%
src/utils/EventListener.js	5	57.5%
src/contracts/implementations/arbitrable/ArbitrableTransaction.js	20	15.0%
src/resources/Notifications.js	36	4.02%
src/contracts/implementations/arbitrator/KlerosPOC.js	65	28.64%

Totals
Change from base Build 711:	-13.5%
Covered Lines:	420
Relevant Lines:	923

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💛 - Coveralls