slapos_accounting: Introduce a simplified version for calculate user's debt to pay

   This is a faster version to later accomodate custom implementation from Cloud Contracts

master/bt5/slapos_accounting/SkinTemplateItem/portal_skins/slapos_accounting/Entity_statOutstandingAmount.py

+from Products.ZSQLCatalog.SQLCatalog import SimpleQuery, ComplexQuery
+portal = context.getPortalObject()
+params = {"node_category_strict_membership": ['account_type/asset/receivable',
+                                               'account_type/liability/payable']}
+from DateTime import DateTime
+if at_date:
+  params['at_date'] = at_date
+  params['grouping_query'] = ComplexQuery(
+      SimpleQuery(grouping_reference=None),
+      SimpleQuery(grouping_date=at_date, comparison_operator=">"),
+      logical_operator="OR")
+else:
+  params['grouping_reference'] = None
+
+return portal.portal_simulation.getInventoryAssetPrice(
+              mirror_section_uid = context.getUid(),
+              simulation_state=('stopped', 'delivered'),
+              portal_type=portal.getPortalAccountingMovementTypeList(),
+              **params)

master/bt5/slapos_accounting/SkinTemplateItem/portal_skins/slapos_accounting/Entity_statOutstandingAmount.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="PythonScript" module="Products.PythonScripts.PythonScript"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>Script_magic</string> </key>
+            <value> <int>3</int> </value>
+        </item>
+        <item>
+            <key> <string>_bind_names</string> </key>
+            <value>
+              <object>
+                <klass>
+                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
+                </klass>
+                <tuple/>
+                <state>
+                  <dictionary>
+                    <item>
+                        <key> <string>_asgns</string> </key>
+                        <value>
+                          <dictionary>
+                            <item>
+                                <key> <string>name_container</string> </key>
+                                <value> <string>container</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_context</string> </key>
+                                <value> <string>context</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_m_self</string> </key>
+                                <value> <string>script</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_subpath</string> </key>
+                                <value> <string>traverse_subpath</string> </value>
+                            </item>
+                          </dictionary>
+                        </value>
+                    </item>
+                  </dictionary>
+                </state>
+              </object>
+            </value>
+        </item>
+        <item>
+            <key> <string>_params</string> </key>
+            <value> <string>at_date=None, **kw</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>Entity_statOutstandingAmount</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>