[Go] - Support modules when importing test and coverage reports.

When importing test data (via sonar.go.tests.reportPaths property) or coverage data (via sonar.go.coverage.reportPaths) in a project with modules, the report will use the module name as a package in the json report. GoTestSensor/GoCoverSensor will not import such report correctly, failing to find the related test file. 

WARN: Failed to find test file for package some/path and test TestSomething

We should support modules to resolve test names. See https://github.com/golang/go/wiki/Modules  and https://github.com/SonarSource/sonar-go/issues/361