Replace swsssdk with swsscommon (#11215)

#### Why I did it
Update scripts in sonic-buildimage from py-swsssdk to swsscommon


#### How I did it
Change code to use swsscommon.

#### How to verify it
Pass all E2E test case

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

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- [x] 202006
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- [ ] 201811
- [ ] 201911
- [ ] 202006
- [ ] 202012
- [ ] 202106
- [ ] 202111
- [ ] 202205

#### Description for the changelog
Update scripts in sonic-buildimage from py-swsssdk to swsscommon

#### Link to config_db schema for YANG module changes
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Link should point to correct section on https://github.com/Azure/sonic-buildimage/blob/master/src/sonic-yang-models/doc/Configuration.md
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#### A picture of a cute animal (not mandatory but encouraged)

dockers/docker-orchagent/enable_counters.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
 import time
-import swsssdk
+from swsscommon import swsscommon
 
 # ALPHA defines the size of the window over which we calculate the average value. ALPHA is 2/(N+1) where N is the interval(window size)
 # In this case we configure the window to be 10s. This way if we have a huge 1s spike in traffic,
@@ -23,7 +23,7 @@ def enable_counter_group(db, name):
 
 def enable_rates():
     # set the default interval for rates
-    counters_db = swsssdk.SonicV2Connector()
+    counters_db = swsscommon.SonicV2Connector()
     counters_db.connect('COUNTERS_DB')
     counters_db.set('COUNTERS_DB', 'RATES:PORT', 'PORT_SMOOTH_INTERVAL', DEFAULT_SMOOTH_INTERVAL)
     counters_db.set('COUNTERS_DB', 'RATES:PORT', 'PORT_ALPHA', DEFAULT_ALPHA)
@@ -36,7 +36,7 @@ def enable_rates():
 
 
 def enable_counters():
-    db = swsssdk.ConfigDBConnector()
+    db = swsscommon.ConfigDBConnector()
     db.connect()
     default_enabled_counters = ['PORT', 'RIF', 'QUEUE', 'PFCWD', 'PG_WATERMARK', 'PG_DROP', 
                                 'QUEUE_WATERMARK', 'BUFFER_POOL_WATERMARK', 'PORT_BUFFER_DROP', 'ACL']