pmlogger_daily_report: use unambiguous time window arguments
pmlogger_daily_report: use unambiguous time window arguments

Related to PCP GH #504

Change default start of time window to use format "@%d-%b-%Y",
e.g. @11-Jun-2018.  Change finish time to -T 24h

modified:   src/pmlogger/pmlogger_daily_report.sh

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp