I made a mistake and wrote severity="ooptional" (instead of optional). This caused all the ruleset tests to fail. For the tests, it may not be that bad but in the real execution, this should probably better stop execution and ask user to fix the input.

Output:
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Error with test: rules-reviewed/eap6/orion/tests/xml-orion.windup.test.xml
Cause: Failed to parse XML configuration at: file:/home/mbriskar/workspace/windup/windup-rulesets/rules-reviewed/eap7/eap6/eap6.windup.xml due to: No enum constant org.jboss.windup.reporting.model.Severity.OOPTIONAL
Error with test: rules-reviewed/eap6/jboss-eap5/tests/jboss-eap5-xml.windup.test.xml
Cause: Failed to parse XML configuration at: file:/home/mbriskar/workspace/windup/windup-rulesets/rules-reviewed/eap7/eap6/eap6.windup.xml due to: No enum constant org.jboss.windup.reporting.model.Severity.OOPTIONAL
Error with test: rules-reviewed/eap6/jboss-eap5/tests/jboss-eap5-java.windup.test.xml
Cause: Failed to parse XML configuration at: file:/home/mbriskar/workspace/windup/windup-rulesets/rules-reviewed/eap7/eap6/eap6.windup.xml due to: No enum constant org.jboss.windup.reporting.model.Severity.OOPTIONAL
Error with test: rules-reviewed/eap6/commonj/tests/commonj.windup.test.xml
Cause: Failed to parse XML configuration at: file:/home/mbriskar/workspace/windup/windup-rulesets/rules-reviewed/eap7/eap6/eap6.windup.xml due to: No enum constant org.jboss.windup.reporting.model.Severity.OOPTIONAL