AMBARI-3394: dfs.datanode.du.reserved expects the value in bytes, currently assumption is GB. (jaimin)

ambari-server/src/main/resources/stacks/HDP/2.0.5/services/HDFS/configuration/global.xml

@@ -88,7 +88,7 @@
   </property>
   <property>
     <name>datanode_du_reserved</name>
-    <value>1</value>
+    <value>1073741824</value>
     <description>Reserved space for HDFS</description>
   </property>
   <property>

ambari-server/src/main/resources/stacks/HDP/2.0.6/services/HDFS/configuration/global.xml

@@ -88,7 +88,7 @@
   </property>
   <property>
     <name>datanode_du_reserved</name>
-    <value>1</value>
+    <value>1073741824</value>
     <description>Reserved space for HDFS</description>
   </property>
   <property>

ambari-server/src/main/resources/stacks/HDPLocal/2.0.5/services/HDFS/configuration/global.xml

@@ -88,7 +88,7 @@
   </property>
   <property>
     <name>datanode_du_reserved</name>
-    <value>1</value>
+    <value>1073741824</value>
     <description>Reserved space for HDFS</description>
   </property>
   <property>

ambari-server/src/main/resources/stacks/HDPLocal/2.0.6/services/HDFS/configuration/global.xml

@@ -88,7 +88,7 @@
   </property>
   <property>
     <name>datanode_du_reserved</name>
-    <value>1</value>
+    <value>1073741824</value>
     <description>Reserved space for HDFS</description>
   </property>
   <property>

ambari-web/app/data/HDP2/global_properties.js

@@ -254,9 +254,9 @@ module.exports =
       "name": "datanode_du_reserved",
       "displayName": "Reserved space for HDFS",
       "description": "Reserved space in GB per volume",
-      "defaultValue": "1",
+      "defaultValue": "1073741824",
       "displayType": "int",
-      "unit": "GB",
+      "unit": "bytes",
       "isVisible": true,
       "domain": "global",
       "serviceName": "HDFS",