[9.0] Add stock_reorder_forecast module with tests

[gfcapalbo]

Allows to predict date stock levels will reach minimum by
analizying sales volume in a period and therefore to trigger RFQ's ahead
of time",

reopening of #222

[daramousk]

Hoi @gfcapalbo , is this completed?

[bealdav]

Not blocking for me but, purchase depends of stock and sale of product, then 2 module here as dependencies is sufficient

[gfcapalbo]

@daramousk other than a small flake error and @bealdav 's dependency question , yes. It has been working on production for months

[gfcapalbo]

@bealdav this has been working for months. I have condensed and removed extra dependencies. Do you see anything else? I think this 9.0 version would be useful for many if merged . we are also preparing a 10.0 version.

[gurneyalex]

if you are expecting an integer division here, can you use the '//' operator? This will make the porting to python3 easier.

[gurneyalex]

@gfcapalbo reviewed and approved (tiny improvement suggested);

Please help us reduce the pending PRs stack by reviewing some of them 😸

[rousseldenis]

@lreficent @jbeficent Does this conflicts with stock_demand_estimate ?

[bealdav]

almost ready to be merged, just a small view alert. Thanks fo your work

[rousseldenis]

@bealdav It was fixed by @gurneyalex at f48d027.
@gfcapalbo Could you rebase ?

[bealdav]

My purpose was just that, thanks
openerp_test openerp.addons.base.ir.ir_ui_view: Element '<xpath expr="//field[@name='line_ids']/tree/field[@name='discrepancy_threshold']">' cannot be located in parent view

[rousseldenis]

@gfcapalbo Closing this as no activity. Feel free to reopen it if needed.