JavaRedux: Integer methods + NoSuchElementException

[FliegendeWurst]

Intended Change

The Integer class is a bit useless without providing at least valueOf and intValue, so I added specifications for those methods. And the field value to store the int value.

The NoSuchElementException class is required to implement iterators.

Type of pull request

• New feature (non-breaking change which adds functionality)
• Other: change to JavaRedux (bootstrap classpath)

Ensuring quality

• I have tested the feature as follows: used the newly specified methods in a simple example

Additional information and contact(s)

The contributions within this pull request are licensed under GPLv2 (only) for inclusion in KeY.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.98%. Comparing base (2aa39bb) to head (c8bd40a).
⚠️ Report is 45 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3719      +/-   ##
============================================
- Coverage     47.99%   47.98%   -0.02%     
- Complexity    16046    16057      +11     
============================================
  Files          1683     1683              
  Lines         96044    96094      +50     
  Branches      15387    15394       +7     
============================================
+ Hits          46093    46107      +14     
- Misses        44681    44718      +37     
+ Partials       5270     5269       -1     

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