[560597] 'Rebase' custom JavaJet template on EMF 2.20's version

The only difference between the new PackageClass.javajet and the
upstream version from EMF 2.20.0 is the custom initialization of the
View_PersistedChildren and Diagram_PersistedEdges references.

When re-generating the metamodel using this new version of the
template, the only differences with the previous version are:

- some changes in the JavaDoc of the init() method;
- the "@since" annotations which are lost and must be reverted/added
  back manually.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=560597
Change-Id: I8dea3b76cffba64aaa6d81258c12a60cb3791254
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
2 files changed