Pass username as symbol

Author: jvazquez-r7

modules/post/windows/gather/credentials/smartermail.rb

@@ -140,7 +140,7 @@ def get_smartermail_creds(path)
     username = data.match(/<sysAdminUserName>(.+)<\/sysAdminUserName>/)
     password = data.scan(/<(sysAdminPassword|sysAdminPasswordHash)>(.+)<\/(sysAdminPassword|sysAdminPasswordHash)>/).flatten[1]
 
-    result['username'] = username[1] unless username.nil?
+    result[:username] = username[1] unless username.nil?
 
     if password
       begin