[WFLY-1242] use JBossLogPrintWriter to output log information to jboss logging

https://issues.jboss.org/browse/WFLY-1242
I think it would be better to use something like a static `ByteArrayOutputStream`. We wrap `System.xxx` with jboss-stdio and it could potentially hold a reference of a `PrintStream` we no longer use. Currently this shouldn't be an issue, but there is potential that a change to stdio or the way we handle it could lead to this holding a reference to `System.out` we no longer want.