Correction composition

settings.gradle

src/main/java/agency/AbstractVehicle.java

src/main/java/agency/CarSpecifics.java

src/main/java/agency/Client.java

src/main/java/agency/ConcreteVehicle.java

src/main/java/agency/MotorbikeSpecifics.java

src/main/java/agency/RentalAgency.java

src/main/java/agency/VehicleTypeSpecifics.java

src/test/java/agency/TestRentalAgency.java