Buildings -- Update Data  - avoid Hibernate not initialized exception that is sometimes thrown
Buildings -- Update Data
 - avoid Hibernate not initialized exception that is sometimes thrown

Merged from dev_sectioning branch, revision 2326.

zuzanamullerova/unitime,sktoo/timetabling-system-,sktoo/timetabling-system-,UniTime/unitime,UniTime/unitime,maciej-zygmunt/unitime,nikeshmhr/unitime,rafati/unitime,rafati/unitime,zuzanamullerova/unitime,rafati/unitime,sktoo/timetabling-system-,maciej-zygmunt/unitime,nikeshmhr/unitime,UniTime/unitime,zuzanamullerova/unitime,nikeshmhr/unitime,maciej-zygmunt/unitime