Fix typo in hadoop templates.

playbooks/roles/hadoop_common/templates/mapred-site.xml.j2

@@ -10,7 +10,7 @@
 {% if mapred_site_config is defined %}
 {% for key,value in mapred_site_config.iteritems() %}
   <property>
-    <name>{{ key }}}</name>
+    <name>{{ key }}</name>
     <value>{{ value }}</value>
   </property>
 {% endfor %}

playbooks/roles/hadoop_common/templates/yarn-site.xml.j2

@@ -14,7 +14,7 @@
 {% if yarn_site_config is defined %}
 {% for key,value in yarn_site_config.iteritems() %}
   <property>
-    <name>{{ key }}}</name>
+    <name>{{ key }}</name>
     <value>{{ value }}</value>
   </property>
 {% endfor %}