fix: extend group inconsistencies script to search both ways
fix: extend group inconsistencies script to search both ways

* till now the script for finding inconsistencies in group structures checked only that members exist in the parent group, now it would detect also missing members in the operand group

martin-kuba/perun,CESNET/perun,zlamalp/perun,martin-kuba/perun,zlamalp/perun,martin-kuba/perun,martin-kuba/perun,zlamalp/perun,martin-kuba/perun,CESNET/perun,CESNET/perun,zlamalp/perun,martin-kuba/perun,zlamalp/perun,CESNET/perun,martin-kuba/perun,zlamalp/perun,CESNET/perun,CESNET/perun,zlamalp/perun,CESNET/perun