driver: Retry to parse json
driver: Retry to parse json

This is a workaround for the case when `prlsrvctl --json` contains messy symbols.
We should try to fetch JSON string using the regexp and try to parse it again.

Fixes GH-204

Parallels/vagrant-parallels,legal90/vagrant-parallels,Parallels/vagrant-parallels,legal90/vagrant-parallels,Parallels/vagrant-parallels,legal90/vagrant-parallels