[feature] Support boot command for pvm builder

Similar to [GH-1082] but for parallels-pvm builder.
Parallels builder mistypes boot command on OmniOS

Fixes [GH-1185] and adds tests for the boot command.
Also requires the latest prl-utils (e592a15) to fix the stuck on enter
while typing.
Parallels errors while creating floppy disk GH-1225

Patch applied with modifications - tests updated to pass.
Parallels-iso errors while removing floppy drive GH-1226

Status "stopping" should be handled in IsRunning
Merge pull request #1278 from rickard-von-essen/issue_1225

Parallels errors while creating floppy disk GH-1225
Merge pull request #1279 from rickard-von-essen/issue_1226

Parallels-iso errors while removing floppy drive GH-1226
Merge pull request #1173 from rickard-von-essen/pvm_bootcommand

[feature] Support boot command for pvm builder
Merge pull request #1187 from rickard-von-essen/fix_typing

builder/parallels: Fixed problems with character when typing boot command