Remove useless data from background tasks extract

[okorach]

This creates a log of junk data in background tasks. Items to remove: SCANNER CONTEXT: "sonar.announcement.message", "sonar.auth.github.allowUsersToSignUp", "sonar.auth.github.apiUrl", "sonar.auth.github.appId", "sonar.auth.github.enabled", "sonar.auth.github.groupsSync", "sonar.auth.github.organizations", "sonar.auth.github.webUrl", "sonar.builtInQualityProfiles.disableNotificationOnUpdate", "sonar.core.id", "sonar.core.serverBaseURL", "sonar.core.startTime", "sonar.dbcleaner.branchesToKeepWhenInactive", "sonar.forceAuthentication", "sonar.host.url", "sonar.java.jdkHome", "sonar.links.ci", "sonar.links.homepage", "sonar.links.issue", "sonar.links.scm", "sonar.links.scm_dev", "sonar.plugins.risk.consent",

BACKGROUND_TASKS: "analysisId", "componentId", "hasScannerContext", "id", "warningCount", "componentQualifier", "nodeName", "componentName", "componentKey", "submittedAt", "executedAt", "type",