[cleanup] organize imports
[cleanup] formatting
added Padding for Integer and Decimals
[cleanup] typo
[cleanup] typo + added one more test case for negative extreme value
[task] added number padding to provisioning layer
[fix] fixing tests to reflect new NumberPadder service
[task] added number padding to extension search logic
[cleanup] removed comment
[cleanup] switched from ArrayList to LinkedList for stacks
[cleanup] typo + improving javadoc
[cleanup] removed local variable
[cleanup] formatting + imports