new method `ubs_numcounter.getRegnumLoosely`

• new method ubs_numcounter.getRegnumLoosely - returns the counter number by mask with possible gaps in the sequence, but faster when getRegnum (does not lock row in ubs_numcounter table and do less DB queries)
• ubs_numcounter.generateAutoIncrementalCode now uses getRegnumLoosely instead of getRegnum - gaps is not a problem here