item balance report (#12983)

* item balance report

* remove hard coding

* Update item_balance.json

* Update item_balance.json

Change name to "Item Balance (Simple)"

* Update item_balance.json
diff --git a/erpnext/stock/report/item_balance/__init__.py b/erpnext/stock/report/item_balance/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/stock/report/item_balance/__init__.py
diff --git a/erpnext/stock/report/item_balance/item_balance.json b/erpnext/stock/report/item_balance/item_balance.json
new file mode 100644
index 0000000..af58fb2
--- /dev/null
+++ b/erpnext/stock/report/item_balance/item_balance.json
@@ -0,0 +1,30 @@
+{
+ "add_total_row": 0, 
+ "apply_user_permissions": 1, 
+ "creation": "2018-02-17 19:52:16.370979", 
+ "disabled": 0, 
+ "docstatus": 0, 
+ "doctype": "Report", 
+ "idx": 0, 
+ "is_standard": "Yes", 
+ "modified": "2018-02-19 12:03:53.902167", 
+ "modified_by": "Administrator", 
+ "module": "Stock", 
+ "name": "Item Balance (Simple)", 
+ "owner": "Administrator", 
+ "query": "select a.item_code as \"Item:Link/Item:120\",\n\t  a.item_name as \"Item Name::150\",\n\t  a.item_group as \"Item Group:Link/Item Group:120\",\n\t  a.brand as \"Brand:Link/Brand:120\",\n\t  a.description as \"Description::150\",\n\t  b.warehouse as \"Warehouse:Link/Warehouse:120\",\n\t  b.actual_qty as \"Balance Qty:Float:140\"\n from `tabItem` a left join `tabBin` b\n ON a.item_code = b.item_code", 
+ "ref_doctype": "Bin", 
+ "report_name": "Item Balance (Simple)", 
+ "report_type": "Query Report", 
+ "roles": [
+  {
+   "role": "Sales User"
+  }, 
+  {
+   "role": "Purchase User"
+  }, 
+  {
+   "role": "Stock User"
+  }
+ ]
+}