Used repo name as a part of release key

Used repo name as a part of release key

PartOf and Release keys in repos.yaml are not uniq. Using them as a
uniq identifier leads to breakage of workflow as they're continuously
rewritten by repomaker for every snapshot for the repos with the
same PartOf and Release keys in repos.yaml

This change uses repo name instead of PartOf and Release. Name is
uniq in repos.yaml, so this should hopefully fix the issue.

Note, that this change requires repomaker to store release ids using
repo name. This is done in this change:
    https://otctools.jf.intel.com/review/#/c/8189/

Change-Id: I63e033bff640ec2ae93e1d522dce55758aff2acd
Signed-off-by: Ed Bartosh <eduard.bartosh@intel.com>