Deprecate JBossTransactionManagerLookup as it is redundant

JDNI lookups from JBossTransactionManagerLookup are all covered by the GenericTransactionManagerLookup.

Furthermore, the JBoss JNDI names are requested first in the GenericTML so there's is no point in having two different TransactioManager lookup classes serving the same purpose.

I suggest that we deprecate the JBossTransactionManagerLookup in the next release.