upgrade solder version to 3.2.0.Final to work on AS 7.1.3/7.2

there was a bug in solder 3.1.1 that caused NPE on weld startup when running on JBoss AS 7.1.3 (which is EAP 6.0.1.GA) and JBoss AS 7.2

solder issue reported as https://issues.jboss.org/browse/SOLDER-337 and it was resolved in 3.2.0.Final version. Tested on AS 7.1.3 with jbpm console-ng

PR excludes default solder version from seam persistence and seam transaction and declares 3.2.0.Final instead.

for reference error that is thrown when using solder 3.1.1 on AS 7.1.3: http://pastebin.com/Zsv1we42