import-vm: remove username, password request params for vm import (#401)

* import-vm: remove username, password request params for vm import

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

* revert

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

* correct revert

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

---------

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

source/adminguide/virtual_machines/importing_unmanaging_vms.rst

@@ -437,8 +437,6 @@ those same credentials are later used for SSH authentication when the QCOW2 imag
 .. parsed-literal::
    - **zoneid** (Zone to which Instance will be imported)
    - **host** (the host name or IP address of External Host)
-   - **username** (the username of External Host for authentication)
-   - **password** (the password of External Host for authentication)
 
 **Response**: