Compile Java regression test sources (1/n)

[peterschrammel]

in preparation to removing all Java compilation products from the repository so that we can eventually compile and test with different JDK versions. We use Maven to compile all Java test sources up-front, each test directory becomes a module. This is significantly faster than calling javac directly for each test directory (because of javac start-up time).

This PR includes the integration of the compilation process (first commit) and two examples how it is going to be used:

• test with single source file
• test that requires jar

There are several test directories that require different kinds of custom compilation, using Jasmin, ASM, etc, which can be handled by customising the build process in the pom.xml files of each test module.

• Each commit message has a non-empty body, explaining why the change was made.
• [n/a] Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• [n/a] The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• [n/a] Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• [n/a] My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• [n/a] White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.93%. Comparing base (f9a7807) to head (381e051).
Report is 11 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8487      +/-   ##
===========================================
+ Coverage    78.38%   78.93%   +0.54%     
===========================================
  Files         1729     1729              
  Lines       200151   198757    -1394     
  Branches     18244    18313      +69     
===========================================
  Hits        156883   156883              
+ Misses       43268    41874    -1394     

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[TGWDB]

Looks ok. There is a doxygen failure but I've not checked if it's related.

[peterschrammel]

There is a doxygen failure but I've not checked if it's related.

This seems unrelated. Earlier PRs have the same issues - requires separate investigation.