Bug Fix: Avoid NullPointException when the ExecutionDegree did not exist for the current execution year. This commit fixes issue #55
[Bug Fix] #389182 Fixes NPE
New Feature: Academic Office - Add operation logs to registration state management. Fixes #38
Merge pull request #56 from JNPA/feature/391340

Bug Fix: Avoid NullPointException when the ExecutionDegree did not exist...
Added grade validation to the academic office schema grade slots that correspond to the group credits equivalence assignments.
Minor change:
- cleaning code
Merge pull request #64 from joaollq/feature/registrationLog

New Feature: Academic Office - Add operation logs to registration state ...
Merge pull request #66 from gil-l/develop

Closes #65: Fractional grades on group credits equivalences
Merge pull request #58 from diutsu/develop

[Bug Fix] #389182 Fixes NPE