TCK spec/flows/basicswitch default flow outcome failure caused by incorrect set call

Switch case test failed for flow b / switch c in the test.

Test: https://github.com/jakartaee/faces/blob/4.0.1/tck/old-tck/source/src/com/sun/ts/tests/jsf/spec/flows/basicswitch/URLClient.java#L61

https://github.com/jakartaee/faces/blob/4.0.1/tck/old-tck/source/src/com/sun/ts/tests/jsf/spec/flows/basicswitch/URLClient.java#L95

<switch id="switchC">
<case>
<if>#{flow_b_Bean.switchC_Case01}</if>
<from-outcome>page01</from-outcome>
</case>
<case>
<if>#{flow_b_Bean.switchC_Case02}</if>
<from-outcome>page02</from-outcome>
</case>
<case>
<if>#{flow_b_Bean.switchC_Case03}</if>
<from-outcome>page03</from-outcome>
</case>
<default-outcome>#{flow_b_Bean.defaultOutcome}</default-outcome>
</switch>

The switch conditions were false so the code should have used the default outcome.

https://github.com/apache/myfaces/blob/8956fd167f797a4e32511e268a6520715cb132a5/impl/src/main/java/org/apache/myfaces/application/NavigationHandlerImpl.java#L838-L849

However, the outcome was null because it was improperly set during the FacesConfigUnmarshallerImpl.java code.