ReFactor service to manager
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	src/main/java/com/ita/edu/softserve/main/OrderStationMain.java
	src/main/java/com/ita/edu/softserve/main/StationServiceMain.java
	src/main/java/com/ita/edu/softserve/service/StationsManager.java
	src/main/java/com/ita/edu/softserve/service/impl/StationsManagerImpl.java
	src/main/tests/com/ita/edu/softserve/service/impl/TestStationServiceImpl.java
edit OrderStationMain