[1.15] cherrypick grpc keepalives (#1382)

[cicoyle]

cherrypick this PR

[artur-ciocanu]

@cicoyle as far as I understand this is a cherry pick, however the Java properties are a little bit inconsistent with other Java property names.

Here we are using a mix of dot notation and camel case, while for other GRPC properties we use dot notation like:

• dapr.grpc.tls.insecure
• dapr.grpc.tls.ca.path

Ideally we should have something like:

• dapr.grpc.keepalive.enabled
• dapr.grpc.keepalive.time.seconds
• dapr.grpc.keepalive.timeout.seconds
• etc

This way we have a nice name spacing approach to properties.

We should try to be consistent, it helps with documentation and long term maintenance.

CC: @javier-aliaga

[cicoyle]

@cicoyle as far as I understand this is a cherry pick, however the Java properties are a little bit inconsistent with other Java property names.

Here we are using a mix of dot notation and camel case, while for other GRPC properties we use dot notation like:

• dapr.grpc.tls.insecure
• dapr.grpc.tls.ca.path

We should try to be consistent, it helps with documentation and long term maintenance.

I'll open follow up PRs to address the inconsistency there, good catch 👍🏻 since you approved this, Ill proceed with this since its a cherrypick then open 2 followup PRs to fix it and add docs👍🏻

[codecov]

Codecov Report

Attention: Patch coverage is 85.00000% with 6 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-1.15@9f7c659). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
sdk/src/main/java/io/dapr/utils/NetworkUtils.java	78.57%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##             release-1.15    #1383   +/-   ##
===============================================
  Coverage                ?   77.58%           
  Complexity              ?     1777           
===============================================
  Files                   ?      205           
  Lines                   ?     5474           
  Branches                ?      600           
===============================================
  Hits                    ?     4247           
  Misses                  ?      907           
  Partials                ?      320           

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