Please convert System.out.println usage to proper log statements

Please convert System.out.println usage to proper log statements:

Subdir opendove/
Running command: grep -rn System.out .
./odmc/rest/src/main/java/org/opendaylight/opendove/odmc/rest/OpenDoveRestClient.java:272: System.out.println("4. *********** REST_CLIENT show-dcs list URI" + uri);