Add db creation script

[keiranjprice101]

closes #70

[louise-davies]

I can't run the script:

Traceback (most recent call last):
  File "util/icat_db_generator.py", line 9, in <module>
    from common.models import db_models
ModuleNotFoundError: No module named 'common'

I've tried running it in utils as well as running it in common

[keiranjprice101]

I had this issue only when I ran it through git bash. It ran fine with powershell. Is it possible this is similar to the issue you have with the tests @louise-davies

[louise-davies]

This is on the preprod machine, so it is using bash but native bash. The preprod machine can run the test command fine.

[keiranjprice101]

Ok. I'll take a look

[keiranjprice101]

@louise-davies I have updated the instructions. It turns out that you need to use python -m util.icat_db_generator This was also the problem I had initially with the instructions for running the api without flask run months ago. e.g. python -m src.main

[louise-davies]

Maybe rename this function if it no longer gets the current time?

[keiranjprice101]

Renamed and changed the range of dates from 2000-2019 to give a nicer range that matches more closely the other possible dates for other fields.