default port for bacnet; ensure INT for port and mask; fixing default BACnet config

[majuss]

default BACnet config:

• ensure mask and port are integer
• application IP cannot be 0.0.0.0 when mask is /24, set a plausible IP

bacnet_connector:

• ensure Port and Mask are read as Integer, everything else will throw errors (string doesnt make any sense)
• ensure default BACnet port even when parameter port is completely skipped

bacnet_tests:

• adjusted tests to integer