Adding logs to internal shadower to check for failures log

[abhishekj720]

What changed?
Added logs to scanWorflow methods.

We need these logs to debug the issues with internal shadower.

Why?

Adding it to check what query has been passed and has been broken in the process.
When running shadower, it says invalid query. So, adding this will tell where the problem is.
How did you test it?
Just adding logs. Will be adding the tests in later diffs.

Potential risks
N/A, as these are just few logs.

[coveralls]

Pull Request Test Coverage Report for Build 2444

Details

• 22 of 22 (100.0%) changed or added relevant lines in 1 file are covered.
• 9 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.04%) to 61.996%

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Files with Coverage Reduction	New Missed Lines	%
src/main/java/com/uber/cadence/internal/sync/WorkflowThreadImpl.java	1	77.32%
src/main/java/com/uber/cadence/internal/replay/DecisionStateMachineBase.java	3	61.18%
src/main/java/com/uber/cadence/internal/replay/ActivityDecisionContext.java	5	89.72%

Totals
Change from base Build 2433:	0.04%
Covered Lines:	12091
Relevant Lines:	19503

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💛 - Coveralls