MINIFICPP-2460 Add tests for S2S tests using SSL

[lordgamez]

• Add tests with both yml and json config, and with both controller property and minifi.properties file configuration
• Fix RPG port properties with JSON flow config
• Add verbose curl debug logs for S2S communication
• Remove redundant feature_id in test modules
• Create test certificate files on test feature level

https://issues.apache.org/jira/browse/MINIFICPP-2460

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[szaszm]

I'd add a comment clarifying that these logs go to the debug level.

Suggested change

	client->setVerbose(false);
	// verbose logs are logged at debug level
	client->setVerbose(/* use_stderr: */ false);