Incorrect JBOSS_HOME warning in vault.sh

vault.sh has an incorrect check to make sure JBOSS_HOME is set correctly.

SANITIZED_JBOSS_HOME=`cd "$JBOSS_HOME/.."; pwd`
if [ "$RESOLVED_JBOSS" != "$SANITIZED_JBOSS_HOME" ]; then

The check will always fail because of the incorrect "/..", which should be removed.

The incorrect value is only used for printing the "WARNING JBOSS_HOME may be pointing to a different installation - unpredictable results may occur." log, and appears to have been around since at least EAP 6.0.