SONAR-13155 upgrade Artifactory plugin to 4.15.1

Changelog contains mainly bug-fixes and preparation of Gradle 6 support
https://www.jfrog.com/jira/browse/GAP-305?jql=project%20%3D%20GAP%20AND%20fixVersion%20in%20(4.11.0%2C%204.12.0%2C%204.14.1%2C%204.15.0%2C%204.15.1)%20ORDER%20BY%20priority%20DESC%2C%20updated%20DESC

build.gradle

@@ -13,7 +13,7 @@ buildscript {
     classpath 'gradle.plugin.nl.javadude.gradle.plugins:license-gradle-plugin:0.14.0'
     classpath 'io.spring.gradle:dependency-management-plugin:1.0.9.RELEASE'
     classpath 'net.rdrei.android.buildtimetracker:gradle-plugin:0.11.1'
-    classpath 'org.jfrog.buildinfo:build-info-extractor-gradle:4.10.0'
+    classpath 'org.jfrog.buildinfo:build-info-extractor-gradle:4.15.1'
     classpath 'org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.8'
   }
 }