RetryUntilSuccessful node typo

[SubaruArai]

In bt_factory.cpp, line 36:

    registerNodeType<RetryNode>("RetryUntilSuccesful");

RetryUntilSuccesful should be RetryUntilSuccessful.

There are a few problems that will happen if we just fix this typo:

1. since this is used to parse the xml files, changing this will make certain xml file unusable.
2. groot exports RetryUntilSuccesful, so we need to fix groot too.

In order to solve this problem, I suggest:

1. add a line registerNodeType<RetryNode>("RetryUntilSuccessful"); so both versions are usable.
2. make a subclass of RetryNode (i.e. RetryNodeTypo) and raise warning when used, so that we can depreciate afterwards.
3. fix the import/export of groot (I haven't read the code thoroughly, but a quick search indicates that we only need to change 1 line in bt_editor/resources/NodesStyle.json, excluding the xml files.)

Fixing is not that hard, but the problem is that there will be some xml files that won't work with groot after the change.
@facontidavide do you have any good ideas?

[facontidavide]

Will go for option 1 for the time being, eventually 2