CalendarTime shows bug with non-zero offset

[damienpicard]

When CalendarTime is used with non-zero offset, an unexpected behaviour appears: the next day starts at hour 1 instead of 0 and the minutes goes to a higher value than 60:

Examples: The simulation of Example/CalendarTime.mo with calendarTime2016.offset = 3600 gives this:

[damienpicard]

This is solved by substracting the offset to the initial equations:

hourSampleStart = integer(time /3600)*3600 - offset;
daySampleStart  = integer((time) /(3600*24))*3600*24 - offset;

I'll propose a pull request.

[Mathadon]

this will be merged through ibpsa/modelica-ibpsa#1100