Release Searchlight for the Stein-2 milestone

As planned [1], Searchlight team will do a release at Stein-2
milestone:

- searchlight: 6.0.0.0b2
- searchlight-ui: 6.0.0.0b2

The major change in this release is the use cases and vision of
Searchlight. There are several bug fixes and package upgrade
as well.

This release was mainly made possible by the contribution of:

- Thuy Dang <thuydang.de@gmail.com>
- Sa Pham <saphi070@gmail.com>

And other contributors.

[1] https://etherpad.openstack.org/p/searchlight-stein-ptg

Change-Id: I3a593c093a8b9cbc3ce88d4a23cbd56574bd3fc3
Signed-off-by: Trinh Nguyen <dangtrinhnt@gmail.com>

deliverables/stein/searchlight-ui.yaml

@@ -7,6 +7,10 @@ releases:
       - hash: 0ff28690223cf9b5f3517bc994728e754c16247c
         repo: openstack/searchlight-ui
     version: 6.0.0.0b1
+  - projects:
+      - hash: f00bb6e2a25ae1b68a1f6d5af1210b3cb1f5a7ed
+        repo: openstack/searchlight-ui
+    version: 6.0.0.0b2
 team: searchlight
 type: horizon-plugin
 repository-settings:

deliverables/stein/searchlight.yaml

@@ -6,6 +6,10 @@ releases:
       - repo: openstack/searchlight
         hash: 665a106e25301382b88b61420c06b336bf9cf866
     version: 6.0.0.0b1
+  - projects:
+      - repo: openstack/searchlight
+        hash: e1df7779bcc2ce3dc14e727af56778a8cb0b6a77
+    version: 6.0.0.0b2
 team: searchlight
 type: service
 repository-settings: