Decision Engine: Implementing runtime mode support (LENIENT vs STRICT) for handling input validation in decision tables.

[ChinchuAjith]

DMN TCK Tests - Test case id : 005 from 1157-unarytests-decisiontable-test-01.xml Fails.

1157-unarytests-decisiontable-test-01.xml

1157-unarytests-decisiontable.txt

This ticket focuses on identifying the root cause of errors introduced by PR dmn-tck/tck#672. Below are the failing tests case introduced by this PR.

<testCase id="005">
        <description>input values: input expression is not valid against input values and will become null</description>
        <resultNode name="decision005" type="decision">
            <expected>
                <value xsi:type="xsd:string">success</value>
            </expected>
        </resultNode>
    </testCase>

1. ERROR: FAILURE: 'decision005' expected='success' but found='null'