Astara 8.0.0.0rc2 mitaka release candidate

This adds tag info for the mitaka 8.0.0.0rc2 release for
the following non-released managed repos:

    - openstack/astara
    - openstack/astara-appliance
    - openstack/astara-neutron

8.0.0.0rc2 tags have already been created in these repos, and
the openstack/astara-horizon project needs no rc2.

Change-Id: I2c86950a76780d2824233e5ebd0f0f2b90eb3ab7

deliverables/mitaka/astara-appliance.yaml

@@ -18,3 +18,7 @@ releases:
     projects:
       - repo: openstack/astara-appliance
         hash: d1e318afdcfa95a2a3f862322590bb16b13ef843
+  - version: 8.0.0.0rc2
+    projects:
+      - repo: openstack/astara-appliance
+        hash: c1a3c7251507adb0745f3a7ec549814b34318088

deliverables/mitaka/astara-neutron.yaml

@@ -18,3 +18,7 @@ releases:
     projects:
       - repo: openstack/astara-neutron
         hash: 78afd004c666c9dbb83c51e9516311dc810903d9
+  - version: 8.0.0.0rc2
+    projects:
+      - repo: openstack/astara-neutron
+        hash: 87c8fe3c29690c8774f73fa5b2aa7f608bdc283a

deliverables/mitaka/astara.yaml

@@ -18,3 +18,7 @@ releases:
     projects:
       - repo: openstack/astara
         hash: 93ecf4dbca5b835b1e461856579444e062281459
+  - version: 8.0.0.0rc2
+    projects:
+      - repo: openstack/astara
+        hash: 48f76f00f238d699f43d2d6ff13f29c4c0df8dac