[core] VerifyMinLength( FN, ExpVal)

[Hrabovszki1023]

Usecase with ANTLR/OKWParser:

• [ ] Testcase with memorized value.
• [ ] Testcase with environment var.
• [ ] Testcase with ${IGNORE} and "" as values.
• [ ] Testcase with ${EMPTY} (VerifyValue-Keyword)

  Exception-testcases:

• [ ] LFC ist not Implemented -> expected Exception: OKWFrameObjectMethodNotFoundException
• [ ] GUI-Object ist not defined in Frame -> expected Exception: OKWFrameObjectChildNotFoundException
• ??? Not allowed value: e.g. „Bandersnatch“ for CheckBoxes:  VerifyExist(„OK“,“Uschi“) -> expected Exception: OKWNotAllowedValueException

see also [core] VerifyHint( FN, ExpVal )

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