Allow passing additional jvm args to the daemon

[happysomani]

I am trying to use mvnd in my project and I hit this issue where the build fails with "Too many open files error". I want to be able to pass the flag -XX:+MaxFDLimit flag to mvnd. Would you happen to know how I can achieve that?

[ppalaga]

Yeah, this is a valid issue. There was some discussion about this in #122 (comment)

[gnodet]

We need to define an additional property that will be used to pass additional arguments when the daemon is created.
This property would have a default of -Xmx4g as we have now, and it would have to be a discriminating factor between daemons (i.e. select a daemon which has the same matching property).
In all cases, we need to be able to make those startup properties configurable, so...