Convert storage batch operation tests.

[Troy Dai (troydai)]

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General Guidelines

• The PR has modified HISTORY.rst with an appropriate description of the change (see Modifying change log).

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• Each command and parameter has a meaningful description.
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[Codecov (codecov-io)]

Codecov Report

Merging #3190 into master will increase coverage by <.01%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master    #3190      +/-   ##
==========================================
+ Coverage   70.34%   70.35%   +<.01%     
==========================================
  Files         383      381       -2     
  Lines       24960    24778     -182     
  Branches     3797     3785      -12     
==========================================
- Hits        17558    17432     -126     
+ Misses       6291     6237      -54     
+ Partials     1111     1109       -2

Impacted Files	Coverage Δ
...c/azure-cli-testsdk/azure/cli/testsdk/preparers.py	69.17% <80%> (+0.23%)	⬆️
...ules/azure-cli-interactive/azclishell/argfinder.py	34.78% <0%> (-2.72%)	⬇️
...li-core/azure/cli/core/test_utils/vcr_test_base.py	69.18% <0%> (-0.98%)	⬇️
...modules/azure-cli-interactive/azclishell/layout.py	43.15% <0%> (-0.85%)	⬇️
src/azure-cli-core/azure/cli/core/application.py	89.42% <0%> (-0.25%)	⬇️
...s/azure-cli-interactive/azclishell/az_completer.py	60.59% <0%> (-0.2%)	⬇️
src/azure-cli-testsdk/azure/cli/testsdk/base.py	69.69% <0%> (-0.16%)	⬇️
...azure-cli-core/azure/cli/core/commands/__init__.py	84.31% <0%> (-0.03%)	⬇️
...zure-cli-interactive/azclishell/gather_commands.py	37.71% <0%> (ø)	⬆️
...dules/azure-cli-interactive/azclishell/progress.py
... and 4 more

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[Travis Prescott (tjprescott)]

LGTM. :)

[Troy Dai (troydai)]

thanks.