delete cli files

Change-Id: I8de44fadf7be8d1ed5fab9ea59ecea6f5b32030b
return correct importer

Change-Id: I02ee0087f11cb16f06ccd614fd0604945073e5f8
add settings.gradle

Change-Id: If0ac0862a72e78029815b5ebdaeb12ee97840c83
did some refactoring by moving loging from LineImporter into AbstractImporter and also added some basic unit tests

Change-Id: I3b81e550818010d9c59f19b003fcfab428e0a869