Exit with correct return code for service o365_mu
requested to merge github/fork/stavamichal/afterErrorWeNeedToReturnNotNullReturnCodeForO365MUService into master
Created by: stavamichal
- we need to exit with correct return code when there is an error in o365_mu service
- use global return code for whole script. If any thread ends with error, whole script will ends with error in the end.
- also if parsing of file return empty line (without correct identifier), script will also ends with not-null return code