Improve autocomplete fields in form

[niio972]

When a form is loaded these autocomplete fields are load with static data (all instances of the concepts needed). For example, all users are load in order to choose contacts. We must use auto-completion directly from the web service using the autocomplete fields.

Concern :

• the web service : OpenSILEX/phis-ws (change exact match to approximate match on some fields)
• the webapp : OpenSILEX/phis-webapp (autocomplete field)

Implements auto-completion fields on several forms :
[] Project form (users, projects)