Consider other alternatives to Gemini JPA

[amlajmi]

Due to the use of Gemini JPA, launching the text editor demo in debug mode requires some fined grained adjustments in the plugins startup levels, which is error prone. The problem has also been reported when deploying war on Unix servers. Moreover, Gemini JPA project seems definitely dead [1]

[1] https://dev.eclipse.org/mhonarc/lists/triquetrum-dev/msg00023.html