Unit test intervention forms

* adds unit test for new/edit intervention forms
* improves code base for generating new identifiers

compensation/models/eco_account.py

@@ -9,6 +9,7 @@ import shutil
 
 from django.urls import reverse
 
+from compensation.settings import ECO_ACCOUNT_IDENTIFIER_TEMPLATE, ECO_ACCOUNT_IDENTIFIER_LENGTH
 from konova.utils.message_templates import DEDUCTION_REMOVED, DOCUMENT_REMOVED_TEMPLATE
 from django.core.exceptions import ValidationError
 from django.core.validators import MinValueValidator
@@ -52,6 +53,9 @@ class EcoAccount(AbstractCompensation, ShareableObjectMixin, RecordableObjectMix
 
     objects = EcoAccountManager()
 
+    identifier_length = ECO_ACCOUNT_IDENTIFIER_LENGTH
+    identifier_template = ECO_ACCOUNT_IDENTIFIER_TEMPLATE
+
     def __str__(self):
         return f"{self.identifier} ({self.title})"