bundles/users: add metadata entry for bash aliases

bundles/users/files/bashrc

@@ -26,4 +26,9 @@ last | grep 'still logged in'
 
 alias v='vim -p'
 alias l='ls -lAh'
+alias ipb='ip -brief'
 </%text>
+
+% for k, v in sorted(node.metadata.get('bash_aliases', {}).items()):
+alias ${k}='${v}'
+% endfor