Add warning for qos deprecation and update contributing guide (#342)

* Add warning for qos deprecation and update contributing guide
* removing version from deprecate_info
* Integration tests command update in Contributing guide

CONTRIBUTING.md

@@ -98,10 +98,10 @@ pip install -r path/to/source/dev_requirements
 ```
 
 _Hub:_  
-`pytest azext_iot/tests/test_iot_ext_unit.py`
+`pytest azext_iot/tests/iothub/test_iot_ext_unit.py`
 
 _DPS:_  
-`pytest azext_iot/tests/test_iot_dps_unit.py`
+`pytest azext_iot/tests/dps/test_iot_dps_unit.py`
 
 ### Integration Tests
 
@@ -127,7 +127,6 @@ You can either manually set the environment variables or use the `pytest.ini.exa
     AZURE_TEST_RUN_LIVE=True
     azext_iot_testrg="Resource Group that contains your IoT Hub"
     azext_iot_testhub="IoT Hub Name"
-    azext_iot_testhub_cs="IoT Hub Connection String"
     azext_iot_testdps="IoT Hub DPS Name"
     azext_iot_teststorageuri="Blob Container SAS Uri"
     azext_iot_identity_teststorageid="Storage Account ID"
@@ -141,13 +140,13 @@ You can either manually set the environment variables or use the `pytest.ini.exa
 
 Execute the following command to run the IoT Hub integration tests:
 
-`pytest azext_iot/tests/test_iot_ext_int.py`
+`pytest azext_iot/tests/iothub/ -k "_int"`
 
 ##### Device Provisioning Service
 
 Execute the following command to run the IoT Hub DPS integration tests:
 
-`pytest azext_iot/tests/test_iot_dps_int.py`
+`pytest azext_iot/tests/dps/ -k "_int"`
 
 #### Unit and Integration Tests Single Command
 
@@ -264,7 +263,7 @@ https://medium.com/@marcobelo/setting-up-python-black-on-visual-studio-code-5318
 
 https://docs.python.org/3/library/pdb.html
 
-1. `pip install pdb`
+1. `pip install pdbpp`
 2. If you need a breakpoint, put `import pdb; pdb.set_trace()` in your code
 3. Run your command, it should break execution wherever you put the breakpoint.
 

azext_iot/_params.py

@@ -82,7 +82,8 @@
     type=str,
     nargs="?",
     choices=["0", "1"],
-    help="Quality of Service. 0 = At most once, 1 = At least once. 2 (Exactly once) is not supported.",
+    help="Quality of Service. 0 = At most once, 1 = At least once. 2 (Exactly once) is not supported."
+    "This command parameter has been deprecated and will be removed in the next release."
 )
 
 event_timeout_type = CLIArgumentType(
@@ -557,7 +558,7 @@ def load_arguments(self, _):
             arg_type=get_enum_type(ProtocolType),
             help="Indicates device-to-cloud message protocol",
         )
-        context.argument("qos", arg_type=qos_type)
+        context.argument("qos", arg_type=qos_type, deprecate_info=context.deprecate())
 
     with self.argument_context("iot device simulate") as context:
         context.argument(