- refactor Network class

pytest-factoryboy current version (1.3.1) is not compatible with
factory_boy >= 2.9
See https://github.com/pytest-dev/pytest-factoryboy/pull/54

- update conda image and all dependencies
- uwsgi now available in conda for Python 3.6 (no need to install gcc to
  install it via pip)
- add new dependency: factory_boy / pytest-factoryboy

Catch exception when no network exists (null is passed as network_id).

- network name should be unique and not nullable
- force all name fields to StringField

Don't ovveride SQLAlchemy __init__ method on db.Model classes.

See http://flask-sqlalchemy.pocoo.org/2.3/quickstart/:
SQLAlchemy adds an implicit constructor to all model classes which
accepts keyword arguments for all its columns and relationships. If you
decide to override the constructor for any reason, make sure to keep
accepting **kwargs and call the super constructor with those **kwargs to
preserve this behavior

ValidationError is catched by default by flask-admin.
It's easy to catch in the api/main.py to raise a CSEntryError.

We actually don't need to catch ValidationError as it's based on
ValueError that we already catch.

Use full exception error as message (error messages from psycopg2 can
be quite long but that makes it much more explicit)

TODO: we should maybe raise ValidationError in models
and catch that to raise CSEntryError in the API

Note that beginning with version 10, a major release is indicated by
increasing the first part of the version, e.g. 10 to 11.

So 10.1 will be a minor version. That's why we can use the docker tag
"10".

See https://www.postgresql.org/support/versioning/

The database constraints will catch the same error
(and raise an IntegrityError).

Having some validation at the model level allows to display nicer error
messages.
We use CSEntryError exception and not ValidationError so that it can be
used both by the API and views.

Allow to use the same CSEntryError exceptions used for validation
in the API and admin views.

Trying to insert an invalid IP or network address raises an exception.
This is due to the unique validator from flask-admin that queries the
database.

The unique validator is automatically added for columns with
unique=True. The only way to disable it is to monkey patch the Unique
class.
This allows the field validator to catch invalid format.

IntegrityError are already catched anyway.

- replace TextAreaField by StringField for several Text columns
- add filter to replace empty string by None on optional Text and INET
  fields

Don't override the Admin view __init__ method for consistency.
Avoid having to import models in admin/views.py

CIText is displayed as a TextAreaField by flask-admin.
Override it to use StringField.

- Allow to pass several mandatory fields in create_generic_model
- Add tests

- A network defines an available range of IP addresses
- A host defines an IP address and name
- A host is always linked to a network
- A mac address is always linked to an item (physical equipment)
- A mac address can be linked to one host (IP)
- An item can have several mac addresses

Text is as efficient in Postgres and is recommended over varchar.
It avoids having to put an arbitrary max length to strings.

CSE makes it clearer that it's linked to CSEntry

This reverts commit 8d6acd19.

See https://issues.jenkins-ci.org/browse/JENKINS-46736

Bug in bitbucket team project?

Client moved to its own repository (ics-inventory-client)

Add button to return to main index

ics_id, serial_number, manufacturer_id and model_id should not change.
Repeating them in the history table takes space for nothing.

We are only interested in tracking the status, location and parent.