slapos_subscription_request: copy property sheets from Subscription Request

master/bt5/slapos_subscription_request/PortalTypePropertySheetTemplateItem/property_sheet_list.xml

 <property_sheet_list>
+ <portal_type id="Subscription Change Request">
+  <item>Amount</item>
+  <item>CredentialRequest</item>
+  <item>DublinCore</item>
+  <item>InstanceTree</item>
+  <item>Person</item>
+  <item>Price</item>
+  <item>Reference</item>
+  <item>SlapOSSaleProfileConstraint</item>
+  <item>SlapOSSubscriptionRequestConstraint</item>
+  <item>Task</item>
+  <item>Url</item>
+  <item>VariationRange</item>
+ </portal_type>
  <portal_type id="Subscription Request">
   <item>Amount</item>
   <item>CredentialRequest</item>

master/bt5/slapos_subscription_request/bt/template_portal_type_property_sheet_list

+Subscription Change Request | Amount
+Subscription Change Request | CredentialRequest
+Subscription Change Request | DublinCore
+Subscription Change Request | InstanceTree
+Subscription Change Request | Person
+Subscription Change Request | Price
+Subscription Change Request | Reference
+Subscription Change Request | SlapOSSaleProfileConstraint
+Subscription Change Request | SlapOSSubscriptionRequestConstraint
+Subscription Change Request | Task
+Subscription Change Request | Url
+Subscription Change Request | VariationRange
 Subscription Request | Amount
 Subscription Request | CredentialRequest
 Subscription Request | DublinCore