AMBARI-10408: NFSGateway fails to start in blueprint installation. (jaimin)

ambari-server/src/main/resources/stacks/HDP/2.3/services/HDFS/configuration/hadoop-env.xml

@@ -75,7 +75,7 @@ export HADOOP_DATANODE_OPTS="-server -XX:ParallelGCThreads=4 -XX:+UseConcMarkSwe
 export HADOOP_CLIENT_OPTS="-Xmx${HADOOP_HEAPSIZE}m $HADOOP_CLIENT_OPTS"
 {% endif %}
 
-HADOOP_NFS3_OPTS="-Xmx{{nfsgateway_heapsize}} -Dhadoop.security.logger=ERROR,DRFAS ${HADOOP_NFS3_OPTS}"
+HADOOP_NFS3_OPTS="-Xmx{{nfsgateway_heapsize}}m -Dhadoop.security.logger=ERROR,DRFAS ${HADOOP_NFS3_OPTS}"
 HADOOP_BALANCER_OPTS="-server -Xmx{{hadoop_heapsize}}m ${HADOOP_BALANCER_OPTS}"
 
 export HADOOP_SECONDARYNAMENODE_OPTS=$HADOOP_NAMENODE_OPTS

ambari-web/app/controllers/main/service/info/configs.js

@@ -240,7 +240,7 @@ App.MainServiceInfoConfigsController = Em.Controller.extend(App.ServerValidatorM
    * List of heapsize properties not to be parsed
    * @type {string[]}
    */
-  heapsizeException: ['hadoop_heapsize', 'yarn_heapsize', 'nodemanager_heapsize', 'resourcemanager_heapsize', 'apptimelineserver_heapsize', 'jobhistory_heapsize'],
+  heapsizeException: ['hadoop_heapsize', 'yarn_heapsize', 'nodemanager_heapsize', 'resourcemanager_heapsize', 'apptimelineserver_heapsize', 'jobhistory_heapsize', 'nfsgateway_heapsize'],
 
   /**
    * Regular expression for heapsize properties detection

ambari-web/app/controllers/wizard/step8_controller.js

@@ -1783,7 +1783,7 @@ App.WizardStep8Controller = Em.Controller.extend(App.AddSecurityConfigs, App.wiz
     var configs = this.get('configs').filterProperty('filename', site + '.xml');
     var attributes = App.router.get('mainServiceInfoConfigsController').getConfigAttributes(configs);
     configs.forEach(function (_configProperty) {
-        var heapsizeExceptions = ['hadoop_heapsize', 'yarn_heapsize', 'nodemanager_heapsize', 'resourcemanager_heapsize', 'apptimelineserver_heapsize', 'jobhistory_heapsize'];
+        var heapsizeExceptions = ['hadoop_heapsize', 'yarn_heapsize', 'nodemanager_heapsize', 'resourcemanager_heapsize', 'apptimelineserver_heapsize', 'jobhistory_heapsize', 'nfsgateway_heapsize'];
         // do not pass any globals whose name ends with _host or _hosts
         if (_configProperty.isRequiredByAgent !== false) {
           // append "m" to JVM memory options except for heapsizeExtensions