Add releasenotes for Mogan

From the beginning of Mogan, we have done a lof of work
for it, should add some releasenotes for user to know what
changes happened here.

Change-Id: I58fc6a166e8da038aa42701fbd665c4db122d6ec

releasenotes/notes/add-keypair-support-for-servers-7768dca78c75c9b8.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Add ssh keypair support for baremetal servers like nova, as admin_pass
+    is not worked with cloud-init by default, keypair is a must for users to
+    access and manage the servers.

releasenotes/notes/console-support-1da6376550c48789.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Support to get console from bms, introduce the console API, consoleauth
+    manager and shellinabox console proxy.

releasenotes/notes/create-server-taskflow-607aab72a8e96c00.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Introduce taskflow in creation process of server, which could support to
+    rollback in the process of creating an server.

releasenotes/notes/floating-ip-associate-unassociate-7675d0c7a1f7ed87.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Add floating IP related methods, so users can associate/disassociate FIP
+    to their servers.

releasenotes/notes/introduce-guru-mechanism-c0668e20caec3eef.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Introduce Guru to Mogan. Guru is a mechanism whereby developers and system
+    administrators can generate a report about the state of a running Mogan
+    executable. This report is called a *Guru Meditation Report*.

releasenotes/notes/notification-task-b944eb7066c4f901.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Introduce versioned notification base, and add instances action
+    notification in Mogan.

releasenotes/notes/support-multi-servers-creating-b4f551b8636b1d08.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Support to create multi-servers in one request of mogan. Mogan will check
+    and find the exact number of servers which will be created finally.

releasenotes/notes/support-quota-in-mogan-ef7726d5dee05135.yaml

@@ -1,5 +1,5 @@
 ---
 features:
-  - Support quota for instances in Mogan, add quota operation in creating and
-    deleting instances process. Now only support database quota driver by
+  - Support quota for servers in Mogan, add quota operation in creating and
+    deleting servers process. Now only support database quota driver by
     default.

releasenotes/notes/support-to-lock-unlock-server-a1d220d0d973899d.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Add a lock and unlock API to change server's 'locked' status to
+    True or Flase. This will disallow deleting server after locking.

releasenotes/notes/support-to-rebuild-server-7555d590af2a724c.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Support to rebuild the baremetal server in Mogan. This feature allows
+    users to redeploy their servers.