add getExam and createExam methods to Repository
fix conflict
merging
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/ge/edu/sangu/unisys/db/DataBaseManager.java
	src/main/java/ge/edu/sangu/unisys/models/StudentResults.java
Merge branch 'master' of https://github.com/DatoBula/unisys.git

Conflicts:
	src/main/java/ge/edu/sangu/unisys/db/DataBaseManager.java