Makes service method API invocations over HTTP by default.

[artursouza]

Description

Makes service method API invocations over HTTP by default.

Issue reference

We strive to have all PR 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: #438

Checklist

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

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[mukundansundar]

I can understand why you left it as methodInvocation in the propery and METHODINVOCATION in the env var, but I think method.invocation and METHOD_INVOCATION looks better and follows convention.

[codecov]

Codecov Report

Merging #450 (ffde75f) into master (38b899d) will decrease coverage by 0.34%.
The diff coverage is 67.04%.

@@             Coverage Diff              @@
##             master     #450      +/-   ##
============================================
- Coverage     83.30%   82.95%   -0.35%     
- Complexity      861      900      +39     
============================================
  Files            74       76       +2     
  Lines          2569     2640      +71     
  Branches        261      263       +2     
============================================
+ Hits           2140     2190      +50     
- Misses          301      322      +21     
  Partials        128      128              

Impacted Files	Coverage Δ	Complexity Δ
...main/java/io/dapr/actors/runtime/ActorRuntime.java	56.16% <0.00%> (ø)	20.00 <0.00> (ø)
...rc/main/java/io/dapr/client/DaprClientBuilder.java	68.42% <45.45%> (-2.55%)	11.00 <3.00> (+3.00)	⬇️
.../java/io/dapr/actors/client/ActorProxyBuilder.java	63.41% <60.00%> (+0.25%)	11.00 <6.00> (+1.00)
sdk/src/main/java/io/dapr/config/Properties.java	77.77% <71.42%> (-7.94%)	1.00 <0.00> (ø)
.../src/main/java/io/dapr/client/DaprClientProxy.java	72.22% <72.22%> (ø)	33.00 <33.00> (?)
.../src/main/java/io/dapr/client/DaprApiProtocol.java	100.00% <100.00%> (ø)	1.00 <1.00> (?)
.../src/main/java/io/dapr/client/DaprHttpBuilder.java	81.25% <100.00%> (ø)	5.00 <0.00> (ø)
.../src/main/java/io/dapr/config/BooleanProperty.java	0.00% <0.00%> (-66.67%)	0.00% <0.00%> (-1.00%)
... and 2 more

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