Resolve "Tests for movies and images"

See merge request !20

Added test for login module

See merge request !25

# Conflicts:
#	core/src/main/java/cz/muni/fi/pa165/user/UserController.java
#	core/src/main/java/cz/muni/fi/pa165/user/UserService.java

Commented testGetMovies, because it used prod DB, which is populated with testCreateMovie -> will be fixed when repository mock is used

User tests

See merge request !23

Resolve "Entities for rating package"

See merge request !19

Added functionality for movie and image entities

See merge request !18

Recommender service tests

See merge request !17

Change the order of pipeline jobs, so tests run first

See merge request !16

Merge remote-tracking branch 'origin/16-entities-for-user-package' into 16-entities-for-user-package

Added h2 database

See merge request !13

Resolve "Create pipeline for tests"

See merge request !11

Milestone 1

See merge request !10