removed requirement to enter a phone number in various places on an IPR disclosure entry form

Fixes bug ietf-tools#1176
 - Legacy-Id: 6672

Author: rjsparks

ietf/ipr/models.py

@@ -151,7 +151,7 @@ class IprContact(models.Model):
     department = models.CharField(blank=True, max_length=255)
     address1 = models.CharField(blank=True, max_length=255)
     address2 = models.CharField(blank=True, max_length=255)
-    telephone = models.CharField(max_length=25)
+    telephone = models.CharField(blank=True, max_length=25)
     fax = models.CharField(blank=True, max_length=25)
     email = models.EmailField(max_length=255)
     def __str__(self):

ietf/ipr/new.py

@@ -33,7 +33,7 @@ class Meta:
         exclude = ('rfc_document', 'id_document_tag') # 'legacy_url_0','legacy_url_1','legacy_title_1','legacy_url_2','legacy_title_2')
 
 class BaseContactForm(ModelForm):
-    telephone = forms.RegexField(phone_re, error_message=phone_error_message)
+    telephone = forms.RegexField(phone_re, error_message=phone_error_message, required=False)
     fax = forms.RegexField(phone_re, error_message=phone_error_message, required=False)
     class Meta:
         model = models.IprContact