missing input/output declaration on weather bus

[mwetter]

Simulating

jm_ipython.sh jmodelica.py IBPSA.BoundaryConditions.SkyTemperature.Examples.BlackBody

gives warnings of the type:

Warning at line 3, column 3, in block 'IBPSA.BoundaryConditions.WeatherData.ReaderTMY3':
    The variable 'HDifHor' in connector 'weaBus' inside block 'ReaderTMY3' must be either a input or output. All variables in connectors contained in a block must be inputs or outputs.
Warning at line 3, column 3, in block 'IBPSA.BoundaryConditions.WeatherData.ReaderTMY3':
    The variable 'HDirNor' in connector 'weaBus' inside block 'ReaderTMY3' must be either a input or output. All variables in connectors contained in a block must be inputs or outputs.

This is with OCT 1.66.

This issue is to analyze and correct the implementation.

@JayHuLBL : Can you please have a look into this.