[swss]: flush asic db in swss.sh for non warm-boot (sonic-net#2582)

need to flush asic db in swss.sh instead of syncd.sh

orchagent might already started in swss.sh and put commands
into asic db before asic db is flushed in syncd.sh. This
causes race condition such as INIT_VIEW not passing to syncd.

Signed-off-by: Guohan Lu <gulv@microsoft.com>

files/scripts/swss.sh

@@ -91,8 +91,9 @@ start() {
 
     # Don't flush DB during warm boot
     if [[ x"$WARM_BOOT" != x"true" ]]; then
-        debug "Flushing databases ..."
+        debug "Flushing APP, ASIC, COUNTER, CONFIG, and partial STATE databases ..."
         /usr/bin/docker exec database redis-cli -n 0 FLUSHDB
+        /usr/bin/docker exec database redis-cli -n 1 FLUSHDB
         /usr/bin/docker exec database redis-cli -n 2 FLUSHDB
         /usr/bin/docker exec database redis-cli -n 5 FLUSHDB
         clean_up_tables 6 "'PORT_TABLE*', 'MGMT_PORT_TABLE*', 'VLAN_TABLE*', 'VLAN_MEMBER_TABLE*', 'INTERFACE_TABLE*', 'MIRROR_SESSION*', 'VRF_TABLE*'"

files/scripts/syncd.sh

@@ -88,10 +88,6 @@ start() {
         touch /host/warmboot/warm-starting
     else
         rm -f /host/warmboot/warm-starting
-
-        # Flush ASIC DB during non-warm start
-        debug "Flushing ASIC database ..."
-        /usr/bin/docker exec database redis-cli -n 1 FLUSHDB
     fi
 
     # platform specific tasks