scalability_test: re-export PathTemplateItem in new format

Before we had the sub-documents exported as properties of container document
for some reason. Now they are exported as separate documents, as expected.

bt5/erp5_scalability_test/PathTemplateItem/business_configuration_module/default_standard_configuration/5/1/default_address.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Address" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>categories</string> </key>
+            <value>
+              <tuple>
+                <string>region/europe/western_europe/france</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>city</string> </key>
+            <value> <string>Paris</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>default_address</string> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Address</string> </value>
+        </item>
+        <item>
+            <key> <string>sid</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>street_address</string> </key>
+            <value> <string>Telecom</string> </value>
+        </item>
+        <item>
+            <key> <string>zip_code</string> </key>
+            <value> <string>75013</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_scalability_test/PathTemplateItem/business_configuration_module/default_standard_configuration/5/1/default_email.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Email" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>coordinate_text</string> </key>
+            <value> <string>scalability@nexedi.com</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>default_email</string> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Email</string> </value>
+        </item>
+        <item>
+            <key> <string>sid</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>url_string</string> </key>
+            <value> <string>scalability@nexedi.com</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_scalability_test/PathTemplateItem/business_configuration_module/default_standard_configuration/5/1/default_telephone.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Telephone" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>coordinate_text</string> </key>
+            <value> <string>1111111111</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>default_telephone</string> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Telephone</string> </value>
+        </item>
+        <item>
+            <key> <string>sid</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>telephone_area</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>telephone_city</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>telephone_country</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>telephone_extension</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>telephone_number</string> </key>
+            <value> <string>1111111111</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>