erp5_certificate_authority: Write the auth certificate properly

  Ensure it has a new between the 2

bt5/erp5_certificate_authority/DocumentTemplateItem/portal_components/document.erp5.CaucaseConnector.py

@@ -74,14 +74,12 @@ class CaucaseConnector(XMLObject):
     if self.getUserCertificate() is None:
       raise ValueError("You need to set the User Key and Certificate!")
 
-    return self._getConnection(user_key="/srv/slapgrid/slappart19/tmp/couscous")
-    with tempfile.NamedTemporaryFile(prefix='caucase_user_') as user_key_file:
-      user_key_file.write(
-        self.getUserKey() + self.getUserCertificate()
-      )
-      # XXX Ensure the file is fully writen
+    with tempfile.NamedTemporaryFile(prefix='caucase_user_', bufsize=0) as user_key_file:
+      user_key_file.write(self.getUserKey())
+      user_key_file.write("\n")
+      user_key_file.write(self.getUserCertificate())
       user_key_file.flush()
-      user_key_file.seek(0)
+
       return self._getConnection(user_key=user_key_file.name)
 
   def _bootstrapCaucaseConfiguration(self):

bt5/erp5_certificate_authority/DocumentTemplateItem/portal_components/document.erp5.CaucaseConnector.xml

@@ -45,9 +45,7 @@
         <item>
             <key> <string>text_content_warning_message</string> </key>
             <value>
-              <tuple>
-                <string>W: 78,  9: Unreachable code (unreachable)</string>
-              </tuple>
+              <tuple/>
             </value>
         </item>
         <item>