Remove dependency on JTA API

[manovotn]

Fixes #608

This is one of the ways to address it as we don't really need the dependency on JTA apart from javadoc of a single class.

(FYI @arjantijms)

[manovotn]

I have also noticed that we are declaring EJB API dependency directly inside maven javadoc plugin.
Maybe that would be a better option? We'd still be keeping the cyclic dep and would, by definiton, have an outdated version there on release.

[Ladicek]

Sounds like a good idea, but I wouldn't mind if we got rid of the EJB dependency as well :-)

[Ladicek]

Not merging yet, as I assume we'll wanna discuss this on the CDI call tomorrow.

[manovotn]

Sounds like a good idea, but I wouldn't mind if we got rid of the EJB dependency as well :-)

Yeah, that's exactly what I wanted to bring up in the meeting tomorrow

[arjantijms]

Thanks!