Fix "ValueError: Unknown format code 'd' for object of type 'float'" when (timeout % 60) is a float
Fix "ValueError: Unknown format code 'd' for object of type 'float'" when (duration % 60) is a float
// operator actually returns a float when applied to a float.  So need to wrap it in int()
Merge pull request #623 from ageron/develop

Fix bug in wait_for_ip: ValueError: Unknown format code 'd' for object of type 'float'