Apply swss configuration in a deterministic way (#39)

* Apply swss configuration in determine way
* Apply configs in small chunks
* Add qos settings for Arista

dockers/docker-orchagent/start.sh

@@ -5,7 +5,11 @@ function start_app {
     portsyncd $PORTSYNCD_ARGS &
     intfsyncd &
     neighsyncd &
-    swssconfig &
+    for file in $SWSSCONFIG_ARGS
+    do
+      swssconfig /etc/swss/config.d/$file
+      sleep 1
+    done
 }
 
 function clean_up {
@@ -27,12 +31,18 @@ ORCHAGENT_ARGS=""
 
 PORTSYNCD_ARGS=""
 
+SWSSCONFIG_ARGS="00-copp.config.json "
+
 if [ "$onie_platform" == "x86_64-dell_s6000_s1220-r0" ]; then
     ORCHAGENT_ARGS+="-m $MAC_ADDRESS"
     PORTSYNCD_ARGS+="-p /etc/ssw/Force10-S6000/port_config.ini"
+    SWSSCONFIG_ARGS+="td2.32ports.qos.1.json td2.32ports.qos.2.json td2.32ports.qos.3.json td2.32ports.qos.4.json td2.32ports.qos.5.json td2.32ports.qos.6.json "
+    SWSSCONFIG_ARGS+="td2.32ports.buffers.1.json td2.32ports.buffers.2.json td2.32ports.buffers.3.json "
 elif [ "$aboot_platform" == "x86_64-arista_7050_qx32" ]; then
     ORCHAGENT_ARGS+="-m $MAC_ADDRESS"
     PORTSYNCD_ARGS+="-p /etc/ssw/Arista-7050-QX32/port_config.ini"
+    SWSSCONFIG_ARGS+="td2.32ports.qos.1.json td2.32ports.qos.2.json td2.32ports.qos.3.json td2.32ports.qos.4.json td2.32ports.qos.5.json td2.32ports.qos.6.json "
+    SWSSCONFIG_ARGS+="td2.32ports.buffers.1.json td2.32ports.buffers.2.json td2.32ports.buffers.3.json "
 elif [ "$onie_platform" == "x86_64-mlnx_x86-r5.0.1400" ]; then
     PORTSYNCD_ARGS+="-p /etc/ssw/ACS-MSN2700/port_config.ini"
 elif [ "$onie_platform" == "x86_64-accton_as7512_32x-r0" ]; then