Support requestComputerPartition in more cases.

SlapTool itself shall not force to pass all possible parameters, as slap
library calls it in different ways.

Add support for lack of existence of computer_id and computer_partition_id,
in this case assume that human (person) is logged in by slap library.

master/product/Vifib/Tool/SlapTool.py

@@ -256,9 +256,10 @@ class SlapTool(BaseTool):
 
   security.declareProtected(Permissions.AccessContentsInformation,
     'requestComputerPartition')
-  def requestComputerPartition(self, computer_id, computer_partition_id,
-      software_release, software_type, partition_reference,
-      shared_xml, partition_parameter_xml, filter_xml):
+  def requestComputerPartition(self, computer_id=None,
+      computer_partition_id=None, software_release=None, software_type=None,
+      partition_reference=None, shared_xml=None, partition_parameter_xml=None,
+      filter_xml=None):
     """
     Asynchronously requests creation of computer partition for assigned
     parameters
@@ -601,8 +602,10 @@ class SlapTool(BaseTool):
     instance_xml = etree.tostring(instance, pretty_print=True,
                                   xml_declaration=True, encoding='utf-8')
 
-    software_instance_document = self._getSoftwareInstanceForComputerPartition(
-        computer_id,
+    if computer_id and computer_partition_id:
+      # requested by Software Instance, there is already top part of tree
+      software_instance_document = self.\
+        _getSoftwareInstanceForComputerPartition(computer_id,
         computer_partition_id)
       software_instance_document.requestSoftwareInstance(
               software_release=software_release,
@@ -623,6 +626,22 @@ class SlapTool(BaseTool):
                 predecessor_related_uid=software_instance_document.getUid(),
                 title=partition_reference,
           )
+    else:
+      # requested as root, so done by human
+      person = self.getPortalObject()\
+          .ERP5Site_getAuthenticatedMemberPersonValue()
+      person.requestSoftwareInstance(software_release=software_release,
+              software_type=software_type,
+              software_title=partition_reference,
+              shared=shared,
+              instance_xml=instance_xml,
+              filter_kw=filter_kw)
+      requested_software_instance = person.portal_catalog.\
+          getResultValue(
+                portal_type="Software Instance",
+                source_reference=software_type,
+                title=partition_reference,
+          )
 
     if requested_software_instance is None:
       raise SoftwareInstanceNotReady