[BUG] IRIS_SESSION_TIMEOUT is being interpreted as a string

[FideliusFalcon]

Describe the bug
When setting IRIS_SESSION_TIMEOUT= in the .env the value will be interpreted as a string, which throws an exception.
The issue orriginates from the following line in configuration.py

iris-web/source/app/configuration.py

Line 292 in f380745

PERMANENT_SESSION_LIFETIME = timedelta(minutes=config.load('IRIS', 'SESSION_TIMEOUT', fallback=1440))

It can be fixed by forcing it as an integer:

PERMANENT_SESSION_LIFETIME = timedelta(minutes=int(config.load('IRIS', 'SESSION_TIMEOUT', fallback=1440)))