Change pycommon to use swsscommon (#10099)

#### Why I did it
    Switch py-common from swsssdk to swsscommon.

#### How I did it
    Change code and make file to use swsscommon.

#### How to verify it
    Pass all UT and E2E test.

#### Which release branch to backport (provide reason below if selected)

<!--
- Note we only backport fixes to a release branch, *not* features!
- Please also provide a reason for the backporting below.
- e.g.
- [x] 202006
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- [ ] 201811
- [ ] 201911
- [ ] 202006
- [ ] 202012
- [ ] 202106
- [ ] 202111

#### Description for the changelog
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pull request for inclusion in the changelog:
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#### Link to config_db schema for YANG module changes
<!--
Provide a link to config_db schema for the table for which YANG model
is defined
Link should point to correct section on https://github.com/Azure/SONiC/wiki/Configuration.
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#### A picture of a cute animal (not mandatory but encouraged)

rules/sonic-py-common.mk

@@ -4,6 +4,8 @@ ifeq ($(ENABLE_PY2_MODULES), y)
     SONIC_PY_COMMON_PY2 = sonic_py_common-1.0-py2-none-any.whl
     $(SONIC_PY_COMMON_PY2)_SRC_PATH = $(SRC_PATH)/sonic-py-common
     $(SONIC_PY_COMMON_PY2)_DEPENDS += $(SWSSSDK_PY2)
+    $(SONIC_PY_COMMON_PY2)_DEBS_DEPENDS = $(LIBSWSSCOMMON) \
+                                          $(PYTHON_SWSSCOMMON)
     $(SONIC_PY_COMMON_PY2)_PYTHON_VERSION = 2
     SONIC_PYTHON_WHEELS += $(SONIC_PY_COMMON_PY2)
 endif
@@ -13,6 +15,7 @@ endif
 SONIC_PY_COMMON_PY3 = sonic_py_common-1.0-py3-none-any.whl
 $(SONIC_PY_COMMON_PY3)_SRC_PATH = $(SRC_PATH)/sonic-py-common
 $(SONIC_PY_COMMON_PY3)_DEPENDS += $(SWSSSDK_PY3)
+$(SONIC_PY_COMMON_PY3)_DEBS_DEPENDS = $(PYTHON3_SWSSCOMMON)
 ifeq ($(ENABLE_PY2_MODULES), y)
     # Synthetic dependency to avoid building the Python 2 and 3 packages
     # simultaneously and any potential conflicts which may arise

src/sonic-py-common/setup.py

@@ -3,11 +3,6 @@ from setuptools import setup
 dependencies = [
     'natsort==6.2.1', # 6.2.1 is the last version which supports Python 2
     'pyyaml',
-    'swsssdk>=2.0.1',
-]
-
-high_performance_deps = [
-    'swsssdk[high_perf]>=2.0.1',
 ]
 
 setup(
@@ -21,9 +16,6 @@ setup(
     maintainer='Joe LeVeque',
     maintainer_email='jolevequ@microsoft.com',
     install_requires=dependencies,
-    extras_require={
-        'high_perf': high_performance_deps,
-    },
     packages=[
         'sonic_py_common',
     ],

src/sonic-py-common/sonic_py_common/device_info.py

@@ -7,8 +7,7 @@ import subprocess
 import yaml
 from natsort import natsorted
 
-# TODO: Replace with swsscommon
-from swsssdk import ConfigDBConnector, SonicDBConfig, SonicV2Connector
+from swsscommon.swsscommon import ConfigDBConnector, SonicV2Connector
 
 USR_SHARE_SONIC_PATH = "/usr/share/sonic"
 HOST_DEVICE_PATH = USR_SHARE_SONIC_PATH + "/device"
@@ -485,7 +484,6 @@ def get_all_namespaces(config_db=None):
     front_ns = []
     back_ns = []
     num_npus = get_num_npus()
-    SonicDBConfig.load_sonic_global_db_config()
 
     if is_multi_npu():
         for npu in range(num_npus):

src/sonic-py-common/tests/device_info_test.py

@@ -13,7 +13,7 @@ import pytest
 
 from sonic_py_common import device_info
 
-from .mock_swsssdk import SonicV2Connector
+from .mock_swsscommon import SonicV2Connector
 
 # TODO: Remove this if/else block once we no longer support Python 2
 if sys.version_info.major == 3: