Breaking change tool refactor
Fix for issue https://github.com/Azure/azure-powershell/issues/3333
Resolved final comments left by @markcowl , but will need clarification on [this comment](https://github.com/Azure/azure-powershell/pull/3207/files/23e4fb441699e5bccc7d59c29d04758a9de801ee#diff-daf36aad41d90a62fcd71f000fc4c8ffR127)
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