added error messages
Closes #428
- collecting the actual payment date of external scholarships
- corrected some download links in development mode
- replaced hardcoded text by its labels
Merge pull request #427 from cbartol/ticket/rt-#407083

Closes #427 - Added error messages to handle Domain Exceptions
Bug fix: Closes #429
- the access to this files can be made by academic office, degree
coordinators and own person, this is the easiest way to grant that
access vs groups
changed form property of teacher
[DSI Releaser] prepare release v2.1.16
Merge branch '2.1.16' into develop
[DSI Releaser] prepare for next development iteration
Minor Change: Support compilation on Java 8
Fixes filters in public evaluation page
Merge pull request #434 from diutsu/develop

Closes #433 Fixes filters in public evaluation page
Merge pull request #432 from cbartol/ticket/rt-#408476

Closes #431 Changed form property of struts-teacher
Bug fix: #437
- checking if the event is canceled or not before showing the debt value
Bug fix: Closes #438
- if the Exam has associated date exame document certificate it can not
be deleted; added the correspondent error message
Enhancement: Added the file name error messages to this resource that is
used in teacher portal, to display the correct message.
Adds error message for transposing proposals that dont have the same scheduling
Fixes filters for Teacher Service
Merge pull request #439 from diutsu/develop

Closes #435: Adds error message for transposing proposals that dont have the same scheduling
Closes #440: Fixes filters for Teacher Service
Group translation mechanism
Reoriented the logic of some groups, instead of having a group for each combination of linked objects, have a group for each role in the system: student, teacher, coordinator, etc.