[Jenkins] Use new syntax for warnings plugin.

https://github.com/jenkinsci/warnings-ng-plugin/blob/master/doc/Documentation.md

When the SolidEhlers ctor is not used it was not generated in the library.

Convert double array to int array

Consistent ticks

Only in ERR/WARN/INFO/DBUG/OGS_FATAL and similar, not in
formatted output like xml files.

SmallDeformation nonlocal

Fixed the documentation for an used parameter

Same function is used in Ehlers and in the LinearElasticIsotropic.

These tests are failing on testing machines.

The different tangent types used for the tangent stiffness computation.

Output primary variables on arbitrary meshes.

The functionality of the ProcessVariable isn't needed here.