CLOUDSTACK-1502 Fixed the api-doc build component caused by new API commands:

addIpToNic
removeIpFromNic
listNics

1) Removed trailing whitespaces from commands.properties file for the commands above
2) Created a new category "Nic" in gen_toc.py for the new commands

client/tomcatconf/commands.properties.in

@@ -327,9 +327,9 @@ removeNicFromVirtualMachine=15
 updateDefaultNicForVirtualMachine=15
 
 ####
-addIpToNic=15;
-removeIpFromNic=15;
-listNics=15;
+addIpToNic=15
+removeIpFromNic=15
+listNics=15
 
 #### SSH key pair commands
 registerSSHKeyPair=15

tools/apidoc/gen_toc.py

@@ -132,6 +132,9 @@ known_categories = {
     'Condition': 'AutoScale',
     'Api': 'API Discovery',
     'Region': 'Region',
+    'addIpToNic': 'Nic',
+    'removeIpFromNic': 'Nic',
+    'listNics':'Nic',
     }