[docker-orchagent]: upgrade docker-orchagent to buster (sonic-net#4889)

also update submodule

* 01f810f 2020-07-02 | fix compiling issue for gcc8.3 (sonic-net#1339) [lguohan]
* 9b13120 2020-07-03 | Fix in script to avoid orchagent crash when port down followed by fdb delete (sonic-net#1340) [rupesh-k]
* 9b01844 2020-07-01 | [qosorch] Update QoS scheduler params for shaping features (sonic-net#1296) [Michael Li]
* 86b5e99 2020-07-02 | [mirrororch] Port Mirroring implementation (sonic-net#1314) [rupesh-k]
* c05601c 2020-06-24 | [portsyncd]: add debug message if a port cannot be found in port able (sonic-net#1328) [lguohan]
* a0b6412 2020-06-23 | COPP_DEL_fix: DEL for one trap group from SONIC is resetting all the trap IDs (sonic-net#1273) [SinghMinu]

Signed-off-by: Guohan Lu <lguohan@gmail.com>

dockers/docker-orchagent/Dockerfile.j2

@@ -1,5 +1,5 @@
 {% from "dockers/dockerfile-macros.j2" import install_debian_packages, install_python_wheels, copy_files %}
-FROM docker-config-engine-stretch
+FROM docker-config-engine-buster
 
 ARG docker_container_name
 RUN [ -f /etc/rsyslog.conf ] && sed -ri "s/%syslogtag%/$docker_container_name#%syslogtag%/;" /etc/rsyslog.conf

rules/docker-orchagent.mk

@@ -6,23 +6,21 @@ DOCKER_ORCHAGENT_DBG = $(DOCKER_ORCHAGENT_STEM)-$(DBG_IMAGE_MARK).gz
 
 $(DOCKER_ORCHAGENT)_DEPENDS += $(SWSS)
 
-$(DOCKER_ORCHAGENT)_DBG_DEPENDS = $($(DOCKER_CONFIG_ENGINE_STRETCH)_DBG_DEPENDS)
+$(DOCKER_ORCHAGENT)_DBG_DEPENDS = $($(DOCKER_CONFIG_ENGINE_BUSTER)_DBG_DEPENDS)
 $(DOCKER_ORCHAGENT)_DBG_DEPENDS +=   $(SWSS_DBG) \
                                 $(LIBSWSSCOMMON_DBG) \
                                 $(LIBSAIREDIS_DBG)
 
-$(DOCKER_ORCHAGENT)_DBG_IMAGE_PACKAGES = $($(DOCKER_CONFIG_ENGINE_STRETCH)_DBG_IMAGE_PACKAGES)
+$(DOCKER_ORCHAGENT)_DBG_IMAGE_PACKAGES = $($(DOCKER_CONFIG_ENGINE_BUSTER)_DBG_IMAGE_PACKAGES)
 
 $(DOCKER_ORCHAGENT)_PATH = $(DOCKERS_PATH)/$(DOCKER_ORCHAGENT_STEM)
 
-$(DOCKER_ORCHAGENT)_LOAD_DOCKERS += $(DOCKER_CONFIG_ENGINE_STRETCH)
+$(DOCKER_ORCHAGENT)_LOAD_DOCKERS += $(DOCKER_CONFIG_ENGINE_BUSTER)
 
 SONIC_DOCKER_IMAGES += $(DOCKER_ORCHAGENT)
-SONIC_STRETCH_DOCKERS += $(DOCKER_ORCHAGENT)
 SONIC_INSTALL_DOCKER_IMAGES += $(DOCKER_ORCHAGENT)
 
 SONIC_DOCKER_DBG_IMAGES += $(DOCKER_ORCHAGENT_DBG)
-SONIC_STRETCH_DBG_DOCKERS += $(DOCKER_ORCHAGENT_DBG)
 SONIC_INSTALL_DOCKER_DBG_IMAGES += $(DOCKER_ORCHAGENT_DBG)
 
 $(DOCKER_ORCHAGENT)_CONTAINER_NAME = swss