Eliminate misleading initialization message
Eliminate misleading initialization message

When the container starts, the following output is produced:
```
Starting Oracle Net Listener.
Starting Oracle Database 11g Express Edition instance.

/usr/sbin/startup.sh: ignoring /docker-entrypoint-initdb.d/*
```

It looks like it ignores the entire init directory, however, it only means that it's empty, and the `*` symbol in the `for` loop is not resolved to any list of files, therefore it's used as is and is ignored since it's not a `*.sh` or `*.sql` file.

With the fix, the script will ignore the unresolved wildcard.
wnameless/docker-oracle-xe-11g