Issue #422: Develop SQL Extension

[SafaeAJ]

Develop SQL Extension Module

• Client: Added DatabaseLogUtils.java, DriverLoader.java, JdbcClient.java, SqlResult.java and Unit tests
• Core Module: Added SqlConfiguration.java, SqlCriterionProcessor.java, SqlExtension.java, SqlRequestExecutor.java, and SqlSourceProcessor.java

MetricsHub Agent:

Updated pom.xml, ConfigHelper.java, MetricsHubCliService.java, SqlConfigCli.java and SqlConfigCliTest.java

MetricsHub Engine:

Updated Criterion.java, SqlCriterion.java, Source.java, SqlSource.java, CriterionProcessor.java, CriterionProcessorRegistry.java, ISourceProcessor.java, SourceProcessor.java and SourceUpdaterProcessor.java

Documentation:

Updated cli.md, configure-monitoring.md and README.md

Tested :

Case: Configuration without URL and port

Results :

Tested :

Case 2: Configuration with URL

Results :

[iguitton]

@SafaeAJ, @NassimBtk : I reviewed the existing markdown files. @NassimBtk : Please do not merge this PR. I would like to document this new use case first. Thanks :)

[NassimBtk]

Working on @bertysentry proposals...

[NassimBtk]

Non-regression