AMBARI-8101. Datanode directories add \n between directory names when creating hdfs-site. (jaimin)

ambari-web/app/utils/config.js

@@ -1257,6 +1257,7 @@ App.config = Em.Object.create({
     switch (displayType) {
       case 'directories':
       case 'directory':
+      case 'datanodedirs':
         rez = value.trim().split(/\s+/g).join(',');
         break;
       case 'host':

ambari-web/test/utils/config_test.js

@@ -326,6 +326,13 @@ describe('App.config', function () {
         },
         e: '/a,/b'
       },
+      {
+        config: {
+          displayType: 'datanodedirs',
+          value: ' [DISK]/a [SSD]/b '
+        },
+        e: '[DISK]/a,[SSD]/b'
+      },
       {
         config: {
           displayType: 'host',