added readme and renamed directory

node-definitions/palo-alto/README.md

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+# Palo Alto Networks vFW image
+
+This directory contains the node definition for PAN-OS 10
+
+
+### General Information
+
+default username and password are admin/admin
+mgmt interface defaults to dhcp
+
+Once the image has booted, after you see the following msg on the console "Masterd started successfully", you can logon with
+the default credentials and change the credentials after first logon.
+ 
+        PA-HDF login: admin
+        Password: 
+        System initializing; please wait... (CTRL-C to bypass)
+        Enter old password : 
+
+
+
+
+To set a static ip address issue the following commands :
+
+        configure
+        set deviceconfig system type static
+        set deviceconfig system ip-address <Firewall-IP> netmask <netmask> default-gateway <gateway-IP> dns-setting servers primary <DNS-IP>
+        commit
+
+
+
+