* remove occurrences of Production Order
* rename from report and jsons
* Change Production Order to Work Order
* change occurences of production order from other files
* resolve minor conflict issues and reports
* patch added
* codacy fix
* updated patches, leftover changes
* rename reports, rectify patches
* Use Python 3 style print function
* Use 'Exception as e' instead of 'Exception, e'
* Unpack tuple arguments explicitly in instead of relying on auto unpacking
* Use consistent indentation
* Use 0 if stock_frozen_upto_days is None
* Production Order Enhancements
- Show required items child table
- Source warehouse for each raw materials, in Pro Order Item and BOM Item table
- Group warehouse allowed for source and wip warehouse
- Patch to populate required items, to fix status and reserved qty for stopped pro order
- Cleaned up existing codes
- Test cases
* Set available qty in source and wip warehouse
* minor fix in bom query naming
* Minor Fixes
* Reload BOM doctypes in patch
