Update test-suite Tester::run to return Payload,

[panarch]

Split Tester::run into run and run_inner.
Tester::run now returns Payload and Tester::run_inner returns Result.

[coveralls]

Pull Request Test Coverage Report for Build 5840921762

• 155 of 155 (100.0%) changed or added relevant lines in 45 files are covered.
• 9 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.4%) to 99.198%

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Files with Coverage Reduction	New Missed Lines	%
core/src/executor/execute.rs	9	96.33%

Totals
Change from base Build 5840900252:	0.4%
Covered Lines:	47476
Relevant Lines:	47860

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💛 - Coveralls