Server migration tool should abort if unknown arguments are used

[akrajcik@akrajcik bin]$ ./jboss-server-migration.sh --interactive
Missing argument for option: i
usage: jboss-server-migration [-e <environment file>] [-h] [-i <true/false>] [-s <source>] [-t <target>]
 -e,--environment <environment file>   Path to the properties file containing the user environment.
 -h,--help                             jboss-server-migration
 -i,--interactive <true/false>         Indicates if the migration tool should interact (or not) with the user. Value should either be true or false.
 -s,--source <source>                  Path to the base dir of the server to migrate from.
 -t,--target <target>                  Path to the base dir of the server to migrate to.

[akrajcik@akrajcik bin]$ ./jboss-server-migration.sh -s ../../jboss-eap-6.4/ -i false extra
Argument(s), [extra], will be discarded.

----------------------------------------------------------
----  JBoss Server Migration Tool  -----------------------
----------------------------------------------------------

Retrieving servers...
10:29:14,106 INFO  [logger] SOURCE server name: EAP, version: 6.4.0.GA.
10:29:14,111 INFO  [logger] TARGET server name: JBoss EAP, version: 7.1.0.GA.