The JACOCO axis (i.e. code coverage) fails because of the execution order of maven plugins

As per title, code coverage fails. In particular, the module affected is `ArjunaJTS/idl/idlj-openjdk`. In fact, maven-antrun-plugin and maven-dependency-plugin get executed in the same phase (i.e. generate-sources) and that could lead to errors. To fix this issue (which happens only when the codeCoverage profile is activated), maven-antrun-plugin should be executed during the process-sources phase