support blueprint property placeholders

[rastislavpapp]

property placeholders instyle of ${...}, in blueprint xml files

[davsclaus]

This style with ${ } is also the same for classic Spring <beans> XML files. Would you be able to add that also in a new PR?

[davsclaus]

And also remember to update the changelog in plugin.xml

[rastislavpapp]

And also remember to update the changelog in plugin.xml

I've managed not to forget this time :-)

This style with ${ } is also the same for classic Spring XML files. Would you be able to add that also in a new PR?

This should already be handled by spring plugin itself. Which is part of Ultimate, and I don't know how would Jetbrains react to us replicating ultimate features in a CE plugin :-)
I've actually thought about whether the blueprint support should be a part of this camel plugin or should be split into a separate blueprint plugin, because it does not really have anything to do with camel :-) but there's some overlap (e.g. knowing about blueprint beans we can interact with them in @BeanInject etc. But it could be possible to have some kind of inter-plugin communication, or awareness.

[davsclaus]

osgi blueprint is dead - its only camel karaf users that use it - so it doe not make sense to build new plugins

you can add a [x] in settings to turn this on | off then users can enable this that do not use ultimate version (which is also a lot of users)