[Enchancement] Migrate to Jakarta EL 8

[dmaidaniuk]

Jinjava uses a very old EL 2.2 implementation that belongs to Java EE 6. Actually, JUEL implementation from Odysseus Software is dead now. The last release was in 2014... I'm a bit confused with the fact that Jinjava sticks to this ancient EL implementation instead of using the current RI for EL 4 (or most fresh Jakarta EL 8).
We have the issue in our Eclipse Krazo project due to this very old EL implementation: eclipse-ee4j/krazo-extensions#4

[dmaidaniuk]

BTW, here is an official site of JUEL: http://juel.sourceforge.net/