restapicontext 2.1

Release notes
Remove the BDM dependency in POM.XML
BonitaBPM Version Compatibility:
7.x
Remove the BDM dependency in POM.XML
Access :
•BDM variables
•when the case is archived, access data
•thanks to Kilian, modify the Date format output
First release
Support update of multiple documents and file type validation.
Manage the children in JSON
Remove the reference of the subscription