[tune](deps): Bump kubernetes from 12.0.1 to 18.20.0 in /python/requirements/tune

[dependabot]

Bumps kubernetes from 12.0.1 to 18.20.0.

Release notes

Sourced from kubernetes's releases.

Kubernetes Python Client v18.20.0 Stable Release

Getting started:

pip install kubernetes==18.20.0

Or from source, download attached zip file, then

unzip client-python-18.20.0.zip
cd client-python-18.20.0
python setup.py install

Then follow examples in https://github.com/kubernetes-client/python/tree/release-18.0/examples.

Changelog: https://github.com/kubernetes-client/python/blob/release-18.0/CHANGELOG.md

Kubernetes Python Client v18.20.0 Beta 1 Release

Getting started:

pip install --pre --upgrade kubernetes

Or from source, download attached zip file, then

unzip client-python-v18.20.0b1.zip
cd client-python-v18.20.0b1
python setup.py install

Then follow examples in https://github.com/kubernetes-client/python/tree/release-18.0/examples

Changelog: https://github.com/kubernetes-client/python/blob/release-18.0/CHANGELOG.md

Kubernetes Python Client v18.17.0 Alpha 1 Release

Getting started:

pip install --pre --upgrade kubernetes

Or from source, download attached zip file, then

unzip client-python-v18.17.0a1.zip
cd client-python-v18.17.0a1
</tr></table> 

... (truncated)

Changelog

Sourced from kubernetes's changelog.

v18.20.0

Kubernetes API Version: 1.18.20

Feature

• Support for the dryRun parameter has been added to the dynamic client. (kubernetes-client/python-base#247, @​gravesm)
• The python2 support will be removed in 18.0.0 beta release. All the tests will use python3 versions. (kubernetes-client/python-base#238, @​Priyankasaggu11929)
• The dynamic client now supports customizing http "Accept" header through the header_params parameter, which can be used to customizing API server response, e.g. retrieving object metadata only. (kubernetes-client/python-base#236, @​Yashks1994)

v18.20.0b1

Kubernetes API Version: 1.18.20

Important Information:

• Python 2 had reached End of Life on January 1, 2020. The Kubernetes Python Client has dropped support for Python 2 from this release (v18.20.0b1) and will no longer provide support to older clients as per the Kubernetes support policy.

v18.17.0a1

Kubernetes API Version: 1.18.17

Important Information:

• The Kubernetes Python client versioning scheme has changed. The version numbers used till Kubernetes Python Client v12.y.z lagged behind the actual Kubernetes minor version numbers. From this release, the client is moving a version format vY.Z.P where Y and Z are respectively from the Kubernetes version v1.Y.Z and P would incremented due to changes on the Python client side itself. Ref: kubernetes-client/python#1244
• Python 2 had reached End of Life on January 1, 2020. The Kubernetes Python Client has dropped support for Python 2 from this release (v18.0.0) and will no longer provide support to older clients as per the Kubernetes support policy.

Deprecations:

• The following deprecated APIs can no longer be served:
  • All resources under apps/v1beta1 and apps/v1beta2 - use apps/v1 instead
  • daemonsets, deployments, replicasets resources under extensions/v1beta1 - use apps/v1 instead
  • networkpolicies resources under extensions/v1beta1 - use networking.k8s.io/v1 instead
  • podsecuritypolicies resources under extensions/v1beta1 - use policy/v1beta1 instead (#85903, @​liggitt) [SIG API Machinery, Apps, Cluster Lifecycle, Instrumentation and Testing]

New Feature:

• Support leader election. kubernetes-client/python-base#206

Bug Fix:

• Raise exception when an empty config file is passed to load_kube_config. kubernetes-client/python-base#223
• fix: load cache error when CacheDecoder object is not callable. kubernetes-client/python-base#226
• Fix Watch retries with 410 errors. kubernetes-client/python-base#227
• Automatically handles chunked or non-chunked responses. Fix ResponseNotChunked error from watch. kubernetes-client/python-base#231

API Change:

• Add allowWatchBookmarks, resoureVersionMatch parameters to custom objects. kubernetes-client/gen#180
• Fix bug in reflector that couldn't recover from "Too large resource version" errors (#92537, @​wojtek-t) [SIG API Machinery]
• Fixed: log timestamps now include trailing zeros to maintain a fixed width (#91207, @​iamchuckss) [SIG Apps and Node]
• Fixed: log timestamps now include trailing zeros to maintain a fixed width (#91207, @​iamchuckss) [SIG Apps and Node]
• Resolve regression in metadata.managedFields handling in update/patch requests submitted by older API clients (#92007, @​apelisse) [SIG API Machinery and Testing]
• A new IngressClass resource has been added to enable better Ingress configuration. (#88509, @​robscott) [SIG API Machinery, Apps, CLI, Network, Node and Testing]
• The CSIDriver API has graduated to storage.k8s.io/v1, and is now available for use. (#84814, @​huffmanca) [SIG Storage]

... (truncated)

Commits

• 888d7df Merge pull request #1527 from roycaihw/v18-ga
• 5231791 update changelog and readme
• 9e3641d apply hotfixes
• 286bd61 generated client change for v18 GA release
• 4a5b39d update version constants for v18 GA release
• 6850340 Merge pull request #1519 from roycaihw/release18
• 8bd7651 update release notes
• 1b80892 Merge branch 'master' of github.com:kubernetes-client/python into release18
• 7d89f02 update submodule
• 837a6ec Merge pull request #1518 from scottilee/release-18-base
• Additional commits viewable in compare view

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