Feature/add asserts like older versions

[wwbakker]

Added asserts which were present in older (private) versions of baker-test.
Fixed some test certificates not having a validity until long in the future.

[codecov-commenter]

Codecov Report

Merging #1349 (d5052fc) into master (c576f31) will increase coverage by 0.00%.
The diff coverage is 94.11%.

@@           Coverage Diff           @@
##           master    #1349   +/-   ##
=======================================
  Coverage   82.54%   82.55%           
=======================================
  Files         129      129           
  Lines        4097     4109   +12     
  Branches      138      138           
=======================================
+ Hits         3382     3392   +10     
- Misses        715      717    +2     

Impacted Files	Coverage Δ
...ain/scala/com/ing/baker/runtime/model/BakerF.scala	40.66% <ø> (ø)
...c/main/scala/com/ing/baker/test/RecipeAssert.scala	91.30% <94.11%> (+0.12%)	⬆️
...untime/akka/actor/process_index/ProcessIndex.scala	83.17% <0.00%> (-0.47%)	⬇️

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