Map null values to empty strings for company_website (#5853)

This fixes an issue where incoming data had null values, which weren't being mapped. This caused the RQ job to error due to violating the database field not null constraint for `EYBLead.company_website`.

Author: oliverjwroberts

datahub/investment_lead/serializers.py

@@ -418,6 +418,7 @@ def get_related_fields_internal_value(self, data):
             'addressLine2': 'address_2',
             'county': 'address_county',
             'postcode': 'address_postcode',
+            'companyWebsite': 'company_website',
             'role': 'role',
             'telphoneNumber': 'telephone_number',
             'landingTimeframe': 'landing_timeframe',

datahub/investment_lead/test/test_serializers.py

@@ -152,7 +152,7 @@ def test_non_required_fields_when_value_is_null_or_empty(self, eyb_lead_triage_d
             'intentOther': value,
             'location': value,
             'locationCity': value,
-            'locationvalue': value,
+            'locationNone': value,
             'hiring': value,
             'spend': value,
             'spendOther': value,
@@ -272,6 +272,7 @@ def test_non_required_fields_when_value_is_null_or_empty(self, eyb_lead_user_dat
             'addressLine2': value,
             'county': value,
             'postcode': value,
+            'companyWebsite': value,
             'role': value,
             'telephoneNumber': value,
             'agreeTerms': value,