[FAB-5660] Improve UT coverage of solo consenter
[FAB-5660] Improve UT coverage of solo consenter

Add test cases to cover re-validation path in solo consenter.

Change-Id: Ic0b6e989e4c4ecac28fdffb66d9f870c5a178aba
Signed-off-by: Jay Guo <91d7eeb83d08be0dc56ea674009c4b53383e15b3@gmail.com>

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