simplify valid jira url logic

.env.sample

@@ -7,7 +7,7 @@ DB_PASS=postgres
 DB_USER=postgres
 DEBUG=True
 DELIVERY_CONSOLE_HOST=
-DS_ISSUE_HOST=
+DS_ISSUE_HOST=https://jira.mozilla.com
 EMAIL_BACKEND=django.core.mail.backends.console.EmailBackend
 EMAIL_HOST=
 EMAIL_HOST_PASSWORD=

app/experimenter/experiments/forms.py

@@ -1,7 +1,6 @@
 import decimal
 import json
 import re
-from urllib.parse import urljoin
 
 from django import forms
 from django.conf import settings
@@ -52,20 +51,15 @@ def clean(self, value):
         if cleaned_value:
             err_str = "Please Provide a Valid URL ex: {ds_url}DS-123 or {ds_url}DO-123"
 
-            DS_root = urljoin(settings.DS_ISSUE_HOST, "DS-")
-            DO_root = urljoin(settings.DS_ISSUE_HOST, "DO-")
-
-            if (
-                DS_root not in cleaned_value and DO_root not in cleaned_value
-            ) or self.get_ds_issue_id(cleaned_value) is None:
+            if self.validate_ds_issue_url(cleaned_value) is None:
 
                 raise forms.ValidationError(err_str.format(ds_url=settings.DS_ISSUE_HOST))
         return cleaned_value
 
-    def get_ds_issue_id(self, bug_url):
+    def validate_ds_issue_url(self, bug_url):
         ds = re.match(re.escape(settings.DS_ISSUE_HOST) + r"(DS|DO)-(\w+.*)", bug_url)
 
-        return ds.group(1)
+        return ds
 
 
 class BugzillaURLField(forms.URLField):