TAJO-1230: Disable ipv6 support on JVM

[ykrips]

Before applying this option, it would be shown like following line.

tcp        0      0 127.0.0.1:26001             0.0.0.0:*                   LISTEN      4494/java           
tcp        0      0 127.0.0.1:26002             0.0.0.0:*                   LISTEN      4494/java           
tcp        0      0 127.0.0.1:26003             0.0.0.0:*                   LISTEN      4494/java           
tcp        0      0 127.0.0.1:26005             0.0.0.0:*                   LISTEN      4494/java           
tcp        0      0 0.0.0.0:26080               0.0.0.0:*                   LISTEN      4494/java          
tcp        0      0 :::28091                    :::*                        LISTEN      4692/java           
tcp        0      0 :::28092                    :::*                        LISTEN      4692/java           
tcp        0      0 :::28093                    :::*                        LISTEN      4692/java           
tcp        0      0 :::38818                    :::*                        LISTEN      4595/java           
tcp        0      0 ::ffff:192.168.122.18:28080 :::*                        LISTEN      4692/java 

With this disable IPv6 option, it will be disable the ipv6 capability on servers.

tcp        0      0 127.0.0.1:26001             0.0.0.0:*                   LISTEN      3796/java           
tcp        0      0 127.0.0.1:26002             0.0.0.0:*                   LISTEN      3796/java           
tcp        0      0 127.0.0.1:26003             0.0.0.0:*                   LISTEN      3796/java           
tcp        0      0 127.0.0.1:26005             0.0.0.0:*                   LISTEN      3796/java           
tcp        0      0 0.0.0.0:28091               0.0.0.0:*                   LISTEN      3995/java           
tcp        0      0 0.0.0.0:28092               0.0.0.0:*                   LISTEN      3995/java           
tcp        0      0 0.0.0.0:28093               0.0.0.0:*                   LISTEN      3995/java           
tcp        0      0 0.0.0.0:26080               0.0.0.0:*                   LISTEN      3796/java           
tcp        0      0 192.168.122.185:28080       0.0.0.0:*                   LISTEN      3995/java           
tcp        0      0 0.0.0.0:11728               0.0.0.0:*                   LISTEN      3897/java 

[hyunsik]

+1

The patch looks straightforward. This patch does not affect any tests. The unit test was failed due to time zone issue (TAJO-1234). I'll commit it shortly.