Add api and manager states and metadata

* api state configures and starts octavia-api service
* manager state configures and starts the following services:
  - octavia-worker
  - octavia-health-manager
  - octavia-housekeeping

Added tests and updated the README.rst

Change-Id: I41c3097ff400b07d659d8aa845d295fbda480cd3
diff --git a/tests/pillar/repo_openstack.sls b/tests/pillar/repo_openstack.sls
new file mode 100644
index 0000000..a638cf6
--- /dev/null
+++ b/tests/pillar/repo_openstack.sls
@@ -0,0 +1,8 @@
+linux:
+  system:
+    enabled: true
+    repo:
+      mirantis_openstack:
+        source: "deb http://mirror.fuel-infra.org/mcp-repos/ocata/xenial ocata main"
+        architectures: amd64
+        key_url: "http://mirror.fuel-infra.org/mcp-repos/ocata/xenial/archive-mcpocata.key"