Create multipul vertica database with different port number

1. Create multipul database instances through "admintools". For example: mydb1 and mydb2;
2. Shutdown all database instances through "admintools";
3. Change port number for database instances.
Backup ${VERTICA_TOP}/config/share/portinfo.dat file, and change port number for some database instances.
For example: mydb1 uses 5433, mydb2 uses 5444.
4. Restart verticad service
$ sudo /etc/init.d/verticad restart