Add spring-milestones to settings.xml

Author: fmbenhassine

settings.xml

@@ -14,6 +14,11 @@
             <username>${env.ARTIFACTORY_USERNAME}</username>
             <password>${env.ARTIFACTORY_PASSWORD}</password>
         </server>
+        <server>
+            <id>spring-milestones</id>
+            <username>${env.ARTIFACTORY_USERNAME}</username>
+            <password>${env.ARTIFACTORY_PASSWORD}</password>
+        </server>
     </servers>
 
 </settings>