[IMP] crm: business model cleaning

Models renamings:
- crm.case.stage becomes crm.stage
- crm.case.section becomes crm.team

Model split:
crm.case.categ has been splitted into:
- crm.phonecall.tag
- crm.lead tag
- crm.claim.tag
- crm.helpdesk.tag

Models removal:
- crm.payment.mode
- crm.segmentation
- report.crm.case

Removal of the crm_profiling module

(all these refactorings have been done in order to ease new API
migrations)