IpFetcher: discard point-to-point connections (causes trouble with VPN enabled).

Author: MarcFraile

src/main/java/cloudgene/mapred/util/IpFetcher.java

@@ -31,7 +31,7 @@ private static String fetchSystemIpV4() {
             while (networkInterfaces.hasMoreElements()) {
                 NetworkInterface iface = networkInterfaces.nextElement();
 
-                if (!iface.isUp() || iface.isLoopback() || iface.isVirtual()) {
+                if (!iface.isUp() || iface.isLoopback() || iface.isVirtual() || iface.isPointToPoint()) {
                     continue;
                 }