Fix of missing <email> end element in pom.xml

Maven error was: (wrapped lines)

[ERROR] Non-parseable POM /home/libor/tmp/jssg-fork/jssg/pom.xml:
end tag name </name> must match start tag name <email> from line 13
(position: TEXT seen ...<email>a.grison@gmail.com</name>... @13:35)
 @ line 13, column 35 -> [Help 2]