Release blazar for stable/xena

This release picks up new commits to blazar since
the last release from stable/xena.

This is being proposed as a convenience to help make sure stable
changes are being released. If the team is good with this going out,
please respond with a +1 to let the release team know it is OK to
proceed.

If it is not wanted at this time, or if there are more changes that
would be good to get merged before doing a stable release, please
leave a -1 with a comment with what the team would prefer. We can
then either abandon this patch, or wait for an update with a new
commit hash to use instead.

$ git log --oneline --no-merges 8.0.0..21d1a95
21d1a95 [CI] Move queue setting to project level
748c9e4 [docs] Install blazar to generate proper docs
4647bfd Switch to stestr
e33f4ea Skip blazar install in docs and pep8 jobs
d80a777 Fix references to start and end dates
c3b8519 Prevent conflicting events from running concurrently
fc40083 Use built-in oslo context de/serialization
9dd5662 Update Nova scheduler filter configuration
775c079 Restore lease status during a non fatal lease update exception
3df9e62 Use LOG.warning instead of deprecated LOG.warn
d20932f Fix list_allocations for multi-host reservations
f8140a2 Fix lease update when resource_type parameter is missing
750a4a9 Update TOX_CONSTRAINTS_FILE for stable/xena
c6f0404 Update .gitreview for stable/xena

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: I8efd7d177d2a4bfa87cce3868c9d9cd4e1568535

deliverables/xena/blazar.yaml

@@ -20,6 +20,10 @@ releases:
       - repo: openstack/blazar
         hash: 233e1c146d77cf0b2944f9dd24fa5d25423dce79
     diff-start: 7.0.0
+  - version: 8.0.1
+    projects:
+      - repo: openstack/blazar
+        hash: 21d1a95d3094029c321082a1e570f8ab631dc41c
 branches:
   - name: stable/xena
     location: 8.0.0.0rc1