dynamic client support and some utilities

[mertkayhan]

<Remember to add meaningful title>

<Short description of the PR>

I have been working with KubeLibrary in Openshift for a while now. I implemented some new features/utilities which made my life easier in my project. Hereby, I would like to add them to the KubeLibrary since they may help the community too.

Fixes #<issue number>

Before merge following needs to be applied:

• At least one example testcase added in testcases/
• Library Documentation regenerated according to Generate docs
• PR entry added in CHANGELOG.md in In progress section
• All new testcases tagged as prerelease along other tags to exclude it from execution until released on PyPI
• Coverage threshold increased in .coveragerc if new coverage is higher than actual, see the lint-and-coverage step in CI

fail_under = 67

[m-wcislo]

I need to take a closer look, but meanwhile would it be possible to add some examples for create, patch, .. or any of them, that would be very useful.

[mertkayhan]

Hello @m-wcislo, I have added some examples under testcases/dynamic_client

[m-wcislo]

Thanks for your contribution. This looks really nice, especially things like:

${conf}=     read conf     testcases/dynamic_client/resources/pod.yaml
create pod     ${conf}

I've added couple comments. Also please go through the checklist from the PR description before it is ready to merge.

[devopsspiral]

OK, it looks good. The missing thing is that wait_pod_completion is somehow still there and please complete the checklist in PR description, like coverage threshold increase, generate docs etc.

[m-wcislo]

Perfect. Could you only bump the .coveragerc to 84. Don't want to these coverage efforts to be lost by someone else.