[docker-lldp]: Do not use TTY mode on lldpctl command (#454)

Signed-off-by: Shuotian Cheng <shuche@microsoft.com>

Author: Shuotian Cheng

dockers/docker-lldp-sv2/base_image_files/lldpctl

@@ -1,2 +1,2 @@
 #!/bin/bash
-docker exec -it lldp lldpctl "$@"
+docker exec -i lldp lldpctl "$@"