I've seen this issue in ODL Autorelease.

[ERROR] Failed to execute goal org.apache.karaf.tooling:karaf-maven-plugin:3.0.3:install-kars (process-resources) on project capwap-karaf: Boot feature odl-capwap-impl-rest is not resolved. Check that <dependencies/> provide the kar of features repository providing this feature (with compile or runtime scope) -> [Help 1]