bypass mux when containers without dynamic endpoints are on the same host

Containers that are on the same host do not need to go through the MUX. The exception to this are containers that have dynamic endpoint imports. These containers rely on the receiving endpoint address to be the host ip (mux).

below is a readout of the container connections for mysql and hmaster after the change.

connection on the mysql container:
```bash
dgarcia@dgarcia-laptop:~/src/europa/src/golang/src/github.com/control-center/serviced$ ./serviced service attach mysql
bash-4.2# netstat -pant | grep 3306 | grep ESTA
tcp        0      0 172.17.0.212:3306       172.17.42.1:50678       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:34152       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41352       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:60632       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:47473       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41338       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41768       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:57452       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41311       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41897       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41324       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:55961       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:47381       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:49125       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:47476       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:49053       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:50681       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:50358       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:60660       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41758       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:41349       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:49122       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:51442       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:50839       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:47396       ESTABLISHED 322/mysqld          
tcp        0      0 172.17.0.212:3306       172.17.42.1:49038       ESTABLISHED 322/mysqld          
```
connection on hmaster:
```bash
dgarcia@dgarcia-laptop:~/src/europa/src/golang/src/github.com/control-center/serviced$ ./serviced service attach hmaster
root@localhost:/# netstat -pant | grep ESTA
tcp        0      0 172.17.0.202:49227      192.168.0.108:2181      ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54621      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:49162         127.0.0.1:8444          ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54136      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:42410      172.17.42.1:4979        ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:2181          10.3.0.2:50408          ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:2181          10.3.0.2:50359          ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54126      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54408      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54575      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:53125         127.0.0.1:5043          ESTABLISHED 28/logstash-forward
tcp        0      0 172.17.0.202:49231      192.168.0.108:2181      ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:5043          127.0.0.1:53125         ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:2183          10.3.0.4:45526          ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:42402      172.17.42.1:4979        ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:2183          10.3.0.4:45537          ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:5042          127.0.0.1:43688         ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:42409      172.17.42.1:4979        ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54610      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 172.17.0.202:54624      192.168.0.108:22250     ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:43688         127.0.0.1:5042          ESTABLISHED 1/serviced      
tcp        0      0 127.0.0.1:8444          127.0.0.1:49162         ESTABLISHED 1/serviced      
tcp6       0      0 10.3.0.4:45526          10.3.0.4:2181           ESTABLISHED 206/java        
tcp6       0      0 127.0.0.1:56156         127.0.0.1:60000         ESTABLISHED 205/java        
tcp6       0      0 172.17.0.202:60000      172.17.42.1:48802       ESTABLISHED 206/java        
tcp6       0      0 127.0.0.1:60000         127.0.0.1:56156         ESTABLISHED 206/java        
tcp6       0      0 172.17.0.202:60000      172.17.42.1:48800       ESTABLISHED 206/java        
tcp6       0      0 172.17.0.202:60000      172.17.42.1:48794       ESTABLISHED 206/java        
tcp6       0      0 10.3.0.2:50408          10.3.0.2:2181           ESTABLISHED 205/java        
tcp6       0      0 10.3.0.2:50359          10.3.0.2:2181           ESTABLISHED 206/java        
tcp6       0      0 10.3.0.4:45537          10.3.0.4:2181           ESTABLISHED 206/java        
```