BUILD-4415 fix authentication for gradle plugins

(cherry picked from commit b63312f68e)

settings.gradle

@@ -2,6 +2,13 @@ pluginManagement {
   repositories {
     maven {
       url 'https://repox.jfrog.io/repox/plugins.gradle.org/'
+      authentication {
+        header(HttpHeaderAuthentication)
+      }
+      credentials(HttpHeaderCredentials) {
+        name = "Authorization"
+        value = "Bearer $System.env.ARTIFACTORY_PRIVATE_PASSWORD"
+      }
     }
   }
   plugins {