3.0.5.RELEASE is used but it doesn't seem to exist.
What is used in main Camel repo is 3.0.5.Final https://github.com/apache/camel/blob/557b53cd3fa3b1961fa055b3b670e11eca6408cb/parent/pom.xml#L539
the version is part of camel-maven-plugin so it is not executed during a normal build. The examples need to be effectively launched to notice it. (so I guess they are not in normal build neither in QE side).