[manila] New release for Manila/Zed

Several bugfixes were added to the stable Zed branch. 
Two new configuration options were added as well [1][2], allowing
for new behavior by preserving backwards compatibility.

Fixes include:

git log --oneline --no-merges 15.0.0..2e16e27
5f9c037a3 Set configured_ip_versions fact in cephfs driver
cfdb3c432 Macrosan driver: some improvements about variables and syntax   [1]
df2cc333e Fix neutron plugin get network_type
440881392 Allow setting endpoint_type for glance                          [2]
6a3f9f06c Rename 'nfs_cluster_id' to 'cluster_id' in the NFSProtocolHelper
4fd8e223e [CI][stable/zed] pin test plugin in grenade skip-level
078bc4300 [RBAC] Return 404 if share is inaccessible
dea2503c8 (gerrit_ssh/stable/zed) Update TOX_CONSTRAINTS_FILE for stable/zed
18fa883b2 Update .gitreview for stable/zed

Change-Id: I0df8062bd800164d95e4ac9da0b0134d41accc48

deliverables/zed/manila.yaml

@@ -37,6 +37,10 @@ releases:
       - repo: openstack/manila
         hash: f8f89548f322107e56dcc1d016a2f88dd3ecb9f3
     diff-start: 14.0.0
+  - version: 15.1.0
+    projects:
+      - repo: openstack/manila
+        hash: 2e16e27d09a8728d4fa7eb2df36d9778156e864e
 branches:
   - name: stable/zed
     location: 15.0.0.0rc1