* [test] Added test case for BlockSigners
* [test] Fixed the bls pubkey deserialize error in TestBlockSigners
* [test] changed some t.Error to t.Fatal
* [test] added TestBallotResult
* [test] Added test TestIncrementValidatorSigningCounts
* [test] added test case TestComputeCurrentSigning
* [test] Added test case TestComputeAndMutateEPOSStatus
* [test] Added error scenario in TestBallotResult
* [test] change the order of imports
* [test] Renamed some variables
* [test] renamed val variables
* [test] Fixed some golint errors