13 fixes by tomas2

See merge request !28

# Conflicts:
#	car/src/main/java/cz/muni/pa165/car/data/repository/CarRepository.java
#	car/src/test/java/cz/muni/pa165/car/rest/DriverManagerControllerItTest.java
#	car/src/test/java/cz/muni/pa165/car/rest/DriverManagerControllerUnitTest.java
#	common_library/src/main/java/cz/muni/pa165/common_library/racecomponents/Car.java
#	common_library/src/main/java/cz/muni/pa165/common_library/racecomponents/CarComponent.java
#	common_library/src/main/java/cz/muni/pa165/common_library/racecomponents/Driver.java

13 fixes by andrej

See merge request !25

Merge branch '13_fixes_by_andrej' of https://gitlab.fi.muni.cz/xgulcik/pa165-formula-one-team into 13_fixes_by_andrej