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These universally unique identifiers (UUIDs) are used to identify the startup features. featuresRepositories references the file $ODL_HOME/etc/290021b0-51f7-4e02-8efa-007cad16f73a.xml, shown here.
root@6cd44c751205:/opt/opendaylight/current/etc# cat $ODL_HOME/etc/290021b0-51f7-4e02-8efa-007cad16f73a.xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<features xmlns="http://karaf.apache.org/xmlns/features/v1.4.0" name="290021b0-51f7-4e02-8efa-007cad16f73a">
<repository>mvn:org.apache.karaf.features/framework/4.1.5/xml/features</repository>
<repository>mvn:org.opendaylight.integration/features-index/0.8.1/xml/features</repository>
<repository>mvn:org.apache.karaf.features/standard/4.1.5/xml/features</repository>
<feature name="0af5d86a-980c-48a9-a02d-bdac71ff8529" version="0.0.0">
<feature prerequisite="false" dependency="false">framework</feature>
<feature prerequisite="false" dependency="false">standard</feature>
<feature prerequisite="false" dependency="false">ssh</feature>
<bundle>mvn:org.apache.aries.quiesce/org.apache.aries.quiesce.api/1.0.0</bundle>
<bundle>mvn:org.osgi/org.osgi.service.event/1.3.1</bundle>
<bundle>mvn:org.bouncycastle/bcprov-jdk15on/1.59</bundle>
<bundle>mvn:org.bouncycastle/bcpkix-jdk15on/1.59</bundle>
<bundle>mvn:org.bouncycastle/bcprov-ext-jdk15on/1.59</bundle>
<bundle>mvn:org.apache.felix/org.apache.felix.metatype/1.1.6</bundle>
<bundle>mvn:org.opendaylight.odlparent/karaf.branding/3.1.0</bundle>
</feature>
</features>
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