Add a method to SerializableTest to obtain a restored object

[uhafner]

No description provided.

[codecov-commenter]

Codecov Report

Merging #230 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #230   +/-   ##
=========================================
  Coverage     88.19%   88.19%           
  Complexity       79       79           
=========================================
  Files             8        8           
  Lines           322      322           
  Branches         47       47           
=========================================
  Hits            284      284           
  Misses           30       30           
  Partials          8        8           

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/edu/hm/hafner/util/FilteredLog.java	100.00% <ø> (ø)	15.00 <0.00> (ø)

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