add method to get FQDN hostname from NetAddress and InetSocketAddress
change system.out.println to LOG.debug because println will affect TfsShellTest
change hostname to FQDN hostname in package master
change hostname to FQDN hostname in package worker
change method to get local hostname and local ip address to methods in NetworkUtils
add unit test to NetworkUtils
format
format
avoid unnecessary toString and concatenation
Merge pull request #409 from uronce-cc/fqdnAddress

[TACHYON-16, 19] Improve Network, FQDN