hob: some settings in Hob are not remembered

Some settings in Hob were not saved in Bitbake and they were not displayed
correcty in Hob, because Hob used some other variables with the extension "_HOB".
I have removed this, in order to have a consistency for the variables.
ALso, I called a function to load the extra variables saved in .hob/template_default.hob.

[YOCTO #3957]
Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
runqueue: Use taskData.fn_index[depdata] instead of uninitialized dep

* dep variable was removed in
  commit 3190cb83e2af195a464f669c5aa8aedbf795160e
  Author: Richard Purdie <richard.purdie@linuxfoundation.org>
  Date:   Wed Jun 27 11:04:06 2012 +0100

    taskdata: Add gettask_id_fromfnid helper function

    This is like gettask_id but doesn't require translation of fnid -> fn
    first which the function then translates back. This gives a sizeable
    performance improvement since a significant number of lookups are avoided.

* now it fails completely instead of showing which task is missing

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>