[ARTEMIS-2626]: Postgresql Journal implementation requires the jdbc driver to be in the same classloader #2987
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Issue:
The BLOB manipulation is done using PostgreSQL internal classes starting from PGConnection. This leads to ClasCastExceptions if the connection is wrapped in a pool or if the driver is in a different classloader (WildFly).
Fix:
unwrap the connection and if the PostgreSQL classes are not directly available uses reflection to manipulate the BLOBs.
Jira: https://issues.apache.org/jira/browse/ARTEMIS-2626
Supersedes #2948