Details
Major Description
Came across a little known feature of M2E project that allows not fully compatible (certified) plugin execution to happen during maven project import phase.
http://wiki.eclipse.org/M2E_plugin_execution_not_covered#execute_plugin_goal
Had to make some more changed but now, importing the drill projects brings the "apache-drill\exec\java-exec\target\generated-sources" in the source fold.