[nis]: track balance resets due to description change as expirations

[Jaguar0625]

[nis]: update MosaicDefinitionCreationObserver to track expirations

 problem: prior to mosaic redefinition fork, a mosaic description change
          would effectively zero all balances
solution: update MosaicDefinitionCreationObserver to track these
          balance resets as mosaic expirations


[nis]: replace ExpiredMosaicCache.removeAll with ExpiredMosaicCache.removeExpiration

 problem: handling of mosaic description changes prior to the mosaic redefinition fork height
          requires the ability to remove a specific mosaic at a specific height
solution: replace removeAll with removeExpiration
          update ExpiredNamespacesObserver

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.57%. Comparing base (ba15c0c) to head (683034d).

Additional details and impacted files

@@            Coverage Diff            @@
##                dev     #575   +/-   ##
=========================================
  Coverage     93.56%   93.57%           
- Complexity     6074     6079    +5     
=========================================
  Files           719      719           
  Lines         17361    17379   +18     
  Branches       1308     1313    +5     
=========================================
+ Hits          16244    16262   +18     
  Misses          864      864           
  Partials        253      253           

Flag	Coverage Δ
nem-nis	94.20% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...a/org/nem/nis/cache/DefaultExpiredMosaicCache.java	95.34% <100.00%> (+0.75%)	⬆️
.../nem/nis/cache/SynchronizedExpiredMosaicCache.java	100.00% <100.00%> (ø)
...em/nis/secret/BlockTransactionObserverFactory.java	100.00% <100.00%> (ø)
.../org/nem/nis/secret/ExpiredNamespacesObserver.java	100.00% <100.00%> (ø)
...m/nis/secret/MosaicDefinitionCreationObserver.java	100.00% <100.00%> (ø)

[Wayonb]

👍🏾