Firewalld notice on cloudstack-setup-databases (apache#143)

* Update _database.rst

* Update _second_mgt.rst

Author: andrijapanicsb

source/installguide/management-server/_database.rst

@@ -385,5 +385,12 @@ same node for MySQL. See `“Install the Database on the Management Server Node
       cloudstack-setup-management
 
    You should get the output message “CloudStack Management Server setup is
-   done.”
+   done!”
 
+   .. warning::
+      On RHEL and CentOS systems, firewalld (installed by default) will override all 
+      iptables rules set by the cloudstack-setup-management script, 
+      so ensure that the firewalld is disabled or ensure the correct firewalld rules
+      are in place to allow traffic to ports 8080, 8250 and 9090 to the management server.
+      
+   

source/installguide/management-server/_second_mgt.rst

@@ -64,6 +64,12 @@ OS for the Management Server.
 
    The Management Server on this node should now be running.
    If the servlet container is Tomcat7 the argument --tomcat7 must be used.
+   
+   .. warning::
+      On RHEL and CentOS systems, firewalld (installed by default) will override all 
+      iptables rules set by the cloudstack-setup-management script, 
+      so ensure that the firewalld is disabled or ensure the correct firewalld rules
+      are in place to allow traffic to ports 8080, 8250 and 9090 to the management server.
 
 #. Repeat these steps on each additional Management Server.