[CI/TEST] Fix YataiService end-to-end tests

[parano]

Description

• Fixed dangling node process issue which causes running all tests in sequence to fail
• Fixed test docker container not being terminated properly after each test run
• chmod -x of a few legacy test script files
• Removed the "bentoml run" call in the YataiService docker container test, since remote "LocalRepository" is not yet supported

Motivation and Context

How Has This Been Tested?

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Documentation
• Test, CI, or build
• None

Components (if applicable)

• BentoService (model packaging, dependency management, handler definition)
• Model Artifact (model serialization, multi-framework support)
• Model Server (mico-batching, logging, metrics, tracing, benchmark, OpenAPI)
• YataiService (model management, deployment automation)
• Documentation

Checklist:

• My code follows the bentoml code style, both ./dev/format.sh and
  ./dev/lint.sh script have passed
  (instructions).
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• My change requires a change in bentoml/gallery example notebooks
• I have sent a pull request to bentoml/gallery to make that change

[codecov]

Codecov Report

Merging #773 into master will not change coverage.
The diff coverage is 68.03%.

@@           Coverage Diff           @@
##           master     #773   +/-   ##
=======================================
  Coverage   55.33%   55.33%           
=======================================
  Files         108      108           
  Lines        8158     8158           
=======================================
  Hits         4514     4514           
  Misses       3644     3644           

Impacted Files	Coverage Δ
bentoml/yatai/deployment/operator.py	53.33% <0.00%> (ø)
bentoml/yatai/deployment/sagemaker/wsgi.py	0.00% <0.00%> (ø)
bentoml/yatai/repository/s3_repository.py	25.75% <25.75%> (ø)
bentoml/yatai/client/deployment_api.py	17.30% <33.33%> (ø)
bentoml/yatai/deployment/aws_lambda/operator.py	58.73% <58.73%> (ø)
bentoml/yatai/yatai_service_impl.py	33.83% <75.00%> (ø)
bentoml/yatai/repository/local_repository.py	75.75% <75.75%> (ø)
bentoml/yatai/deployment/sagemaker/operator.py	80.20% <80.20%> (ø)
bentoml/yatai/repository/repository.py	83.33% <83.33%> (ø)
bentoml/yatai/validator/deployment_pb_validator.py	95.00% <95.00%> (ø)
... and 4 more

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