Split monolithic grid_cron daemon into a thin sbin/ wrapper with all helpers in mig/lib/#455

jonasbardino wants to merge 5 commits intonextucphhpc/migrid-sync:nextfrom

refactor/cron-service-to-sbin-wrapper-with-mib-lib-helpersucphhpc/migrid-sync:refactor/cron-service-to-sbin-wrapper-with-mib-lib-helpersCopy head branch name to clipboard