Bug 1029410

Description of problem:
When user want to move a node role to msgserver host, it failed.
And actually this functionality should not be allow, because once move is allowed, that means the node role should be removed from previous host, that will bring a lot of trouble to complete that. So suggest remove "move role" functionality from menu.

$ ./oo-install -e -a
Checking for necessary tools...
...looks good.
Reusing existing installer assets.
Extracting oo-install to temporary directory...
Starting oo-install...

OpenShift Installer
----------------------------------------------------------------------

Welcome to OpenShift.
This installer will guide you through a basic system deployment, based
on one of the scenarios below.

Select from the following installation scenarios.
You can also type '?' for Help or 'q' to Quit.":
1. Install OpenShift Enterprise
2. Add a Node to OpenShift Enterprise
Type a selection and press <return>: 2


Here are the details of your current deployment.

DNS Settings
  * App Domain: my-osebeta.com.cn
  * Register OpenShift components with OpenShift DNS? Yes
  * Component Domain: my-com.com.cn

Role Assignments
+-----------+--------+
| Broker    | broker |
| MsgServer | msg    |
| DBServer  | db     |
| Nodes     | msg    |
|           | node   |
+-----------+--------+

Host Information
+----------+-------------+
| Host     | broker      |
| Roles    | Broker      |
| SSH Host | 10.4.59.164 |
| User     | root        |
| IP Addr  | 10.4.59.164 |
+----------+-------------+
+----------+-----------------+
| Host     | msg             |
| Roles    | MsgServer, Node |
| SSH Host | 10.4.59.156     |
| User     | root            |
| IP Addr  | 10.4.59.156     |
+----------+-----------------+
+----------+-------------+
| Host     | db          |
| Roles    | DBServer    |
| SSH Host | 10.4.59.149 |
| User     | root        |
| IP Addr  | 10.4.59.149 |
+----------+-------------+
+----------+-------------+
| Host     | node        |
| Roles    | Node        |
| SSH Host | 10.4.59.144 |
| User     | root        |
| IP Addr  | 10.4.59.144 |
+----------+-------------+

Do you want to change the deployment info? (y/n/q/?) y

Choose from the following deployment configuration options:
1. Change the DNS configuration
2. Move an OpenShift role to a different host
3. Modify the information for an existing host
4. Add or remove a Node host
5. Finish editing the deployment configuration
Type a selection and press <return>: 2

Which role do you want to move to a different host?:
1. Broker
2. MsgServer
3. DBServer
4. Node
Type a selection and press <return>: 4

Which host should no longer include the role?:
1. msg (MsgServer, Node)
2. node (Node)
Type a selection and press <return>: 1

Select a host to use for this role::
1. broker (Broker)
2. db (DBServer)
3. Create a new host
Type a selection and press <return>: 1

Here are the details of your current deployment.

DNS Settings
  * App Domain: my-osebeta.com.cn
  * Register OpenShift components with OpenShift DNS? Yes
  * Component Domain: my-com.com.cn

Role Assignments
+-----------+--------+
| Broker    | broker |
| MsgServer | msg    |
| DBServer  | db     |
| Nodes     | broker |
|           | node   |
+-----------+--------+

Host Information
+----------+--------------+
| Host     | broker       |
| Roles    | Broker, Node |
| SSH Host | 10.4.59.164  |
| User     | root         |
| IP Addr  | 10.4.59.164  |
+----------+--------------+
+----------+-------------+
| Host     | msg         |
| Roles    | MsgServer   |
| SSH Host | 10.4.59.156 |
| User     | root        |
| IP Addr  | 10.4.59.156 |
+----------+-------------+
+----------+-------------+
| Host     | db          |
| Roles    | DBServer    |
| SSH Host | 10.4.59.149 |
| User     | root        |
| IP Addr  | 10.4.59.149 |
+----------+-------------+
+----------+-------------+
| Host     | node        |
| Roles    | Node        |
| SSH Host | 10.4.59.144 |
| User     | root        |
| IP Addr  | 10.4.59.144 |
+----------+-------------+

Choose from the following deployment configuration options:
1. Change the DNS configuration
2. Move an OpenShift role to a different host
3. Modify the information for an existing host
4. Add or remove a Node host
5. Finish editing the deployment configuration
Type a selection and press <return>: 5


Here is subscription configuration that the installer will use for
this deployment.
+---------+-------+
| Setting | Value |
+---------+-------+
| type    | none  |
+---------+-------+

Do you want to make any changes to the subscription info in the
configuration file? (y/n/q/?) n

Do you want to set any temporary subscription settings for this
installation only? (y/n/q/?) n

These are your current settings for this workflow:

Here are your previous answers to the questions for this workflow.

Target system - [unset]

Do you want to make any changes to your answers? (y/n/q/?) y

From your list of Nodes, which instance would you like to deploy?:
1. broker (Broker, Node)
2. node (Node)
?  1

Do you want to make any changes to your answers? (y/n/q/?) n

Preflight check: verifying system and resource availability.

Checking broker:
* SSH connection succeeded
* Target host is running Red Hat Enterprise Linux
* Located yum

Checking msg:
* SSH connection succeeded
* Target host is running Red Hat Enterprise Linux
* Located yum

Checking db:
* SSH connection succeeded
* Target host is running Red Hat Enterprise Linux
* Located yum

Checking node:
* SSH connection succeeded
* Target host is running Red Hat Enterprise Linux
* Located yum

Deploying workflow 'enterprise_add_node'.
The specified node to be added also contains other OpenShift components.
Nodes can only be added as standalone components on their own systems. Exiting.

Installation completed.
oo-install exited; keeping temporary assets in /tmp/

Version-Release number of selected component (if applicable):
oo-install-ose-2.0b-20131111-2053

How reproducible:
Always

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: