[teamd.sh]: Remove LAG interfaces on exit (#643)

Use -k option for teamd to properly remove LAG interfaces when docker is
exiting.

Signed-off-by: marian-pritsak <marianp@mellanox.com>

dockers/docker-teamd/teamd.sh

@@ -2,17 +2,10 @@
 
 TEAMD_CONF_PATH=/etc/teamd
 
-# Before teamd could automatically add newly created host interfaces into the
-# LAG, this workaround will be needed. It will remove the obsolete files and
-# net devices that are failed to be removed in the previous run.
 function start_app {
-    # Remove *.pid and *.sock files if there are any
     rm -f /var/run/teamd/*
-    if [ -d $TEAMD_CONF_PATH ]; then
+    if [ "$(ls -A $TEAMD_CONF_PATH)" ]; then
         for f in $TEAMD_CONF_PATH/*; do
-            # Remove netdevs if there are any
-            intf=`echo $f | awk -F'[/.]' '{print $4}'`
-            ip link del $intf
             teamd -f $f -d
         done
     fi
@@ -20,7 +13,11 @@ function start_app {
 }
 
 function clean_up {
-    pkill -9 teamd
+    if [ "$(ls -A $TEAMD_CONF_PATH)" ]; then
+        for f in $TEAMD_CONF_PATH/*; do
+            teamd -f $f -k
+        done
+    fi
     pkill -9 teamsyncd
     exit
 }