Fix invalid class name in plugin.xml

This was reported verbatim from the previous code base in commit
e8cac1baf3aad71b9acb2add6f460aaa15269e8b but the class name appearing
in the plugin.xml should have been rebranded.

Change-Id: I2d3b16e2956ddfd149a51445ec8a27c4dbdd962e
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
Remove duplicate and invalid EMF generated package declaration

Change-Id: Ie0404a6b18c71a85b6c150f2065501123ff94f00
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>