initialize dapr client only once and misc fixes

[mukundansundar]

Signed-off-by: Mukundan Sundararajan 65565396+mukundansundar@users.noreply.github.com

Description

In python DaprClient() was being initialized in the for loop. It can be initialized only once for the whole duration of the quick start.

Issue reference

We strive to have all PRs being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• The quickstart code compiles correctly
• You've tested new builds of the quickstart if you changed quickstart code
• You've updated the quickstart's README if necessary
• If you have changed the steps for a quickstart be sure that you have updated the automated validation accordingly. All of our quickstarts have annotations that allow them to be executed automatically as code. For more information see mechanical-markdown. For user guide with examples see Examples.

[paulyuk]

LGTM. let's just make sure it syncs