Currently, calling the troubleshoot function in a ramdisk script
doesn't work as expected on dracut ramdisks. This adds an alternate
troubleshoot implementation that will behave as intended.
I did not make it conditional on a kernel param as was done in the
original because dracut can behave strangely if you allow it to
continue after an error. Always dropping to a shell immediately
should be less confusing.
Change-Id: I98000f4ac6d7890b1f44fe4d10394ac0ea332fcb
