Issue 280: Enable Stream tags for Python bindings.

[shrids]

Change log description

• Enable Stream tags for Python bindings.

Purpose of the change
Fixes #280

What the code does

• Enable passing of Stream scaling policy and Retention policy for python bindings.
• Enable Stream Tag APIs on python bindings.

# create a stream with stream scaling is enabled with data rate as 10kbps, scaling factor as 2 and initial segments as 1
scalingpolicy = StreamScalingPolicy.auto_scaling_policy_by_data_rate(10, 2, 1)
stream_manager.create_stream_with_policy(scope_name=scope, stream_name="testStream1", scaling_policy=scalingpolicy)
# By default retention policy is disabled.

# update stream with retentionpolicy and tags.
##retention policy of 10GB
retentionpolicy = StreamRetentionPolicy.by_size(10*1024*1024 * 1024)
stream_manager.update_stream_with_policy(scope, "testStream1", scalingpolicy, retentionpolicy, tags=['t1', 't2'])

# fetch stream tags for the given Stream
tags = stream_manager.get_stream_tags(scope, "testStream1")

How to verify it
All the existing and newly added tests should pass.

[codecov-commenter]

Codecov Report

Merging #281 (ecfc844) into master (1d73528) will increase coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #281      +/-   ##
==========================================
+ Coverage   76.58%   76.67%   +0.09%     
==========================================
  Files          44       44              
  Lines       11066    11143      +77     
==========================================
+ Hits         8475     8544      +69     
- Misses       2591     2599       +8     

Impacted Files	Coverage Δ
shared/src/lib.rs	80.98% <ø> (ø)
connection_pool/src/connection_pool.rs	90.59% <0.00%> (-2.80%)	⬇️
src/byte/reader.rs	97.31% <0.00%> (ø)
wire_protocol/src/mock_connection.rs	75.57% <0.00%> (+0.05%)	⬆️
wire_protocol/src/client_connection.rs	94.62% <0.00%> (+0.37%)	⬆️
wire_protocol/src/connection_factory.rs	77.77% <0.00%> (+1.38%)	⬆️
wire_protocol/src/connection.rs	13.15% <0.00%> (+2.66%)	⬆️
src/segment/raw_client.rs	85.18% <0.00%> (+6.83%)	⬆️