Logging stack trace in case of "Erp under maintenance error"

[sbidoul]

When Locomotive cannot reach Odoo, an error is logged but no context is provided:

locomotive-shopinvader/lib/shop_invader/services/erp_service.rb

Lines 221 to 223 in 4c1baa6

	rescue
	log_error 'Odoo Error: server have an internal error, active maintenance mode'
	raise ShopInvader::ErpMaintenance.new('ERP under maintenance')

This error can arise for a number of reasons (bad URL, api key as integer instead of string, etc).
These are very hard to diagnose.
Is it possible to log a stack trace in that case?

Not sure how to do that in ruby @sebastienbeau

[sbidoul]

cc/ @Laurent-Corron

[sbidoul]

cc/ @lmignon