[TDI-29878] - tGoogleDrivePut implement overwrite option,
[TDI-30477] - Change output field type to FILE for tBoxGet
[TBD-79]
Remove mmigration task which break the compatibility between DI job and MR job.
Merge branch 'maintenance/5.6' of ssh://github.com/Talend/tdi-studio-se into maintenance/5.6
Merge pull request #43 from pbailly/maintenance/5.6

Maintenance/5.6
Merge branch 'maintenance/5.6'
Merge pull request #44 from pbailly/master

[TBD-79] Remove migration task