Nova VM lifecycle test

This blueprint is to develop a VM lifecycle test in tempest. Though all the APIs are covered by the community, we dont have a test in the form of a VM lifecycle.

In tempest/compute/servers, we have a test script called test_server_basic_ops.py. As of today it covers a few basic operations but not all that constitute a VM lifecycle. It will be good to have a VMLifecycle test with additional test points.

The test does the basic server operations (tempest/tests/compute/servers/test_server_basic_ops.py)
"""
    This smoke test case follows this basic set of operations:

     * Create a keypair for use in launching an instance
     * Create a security group to control network access in instance
     * Add simple permissive rules to the security group
     * Launch an instance
     * Pause/unpause the instance
     * Suspend/resume the instance
     * Terminate the instance
    """
I am planning to extend this to include the following test points.

    """
    This smoke test case follows this basic set of operations:

     * Create a keypair for use in launching an instance
     * Create a security group to control network access in instance
     * Add simple permissive rules to the security group
     * Launch an instance with keypair and security group
     * Create a floating ip
     * Check if floating ip gets listed
     * Add floating IP to a VM
     * Check if floating up is listed against the VM
     * Enable ping and ssh by adding rules in security group
     * List security group rules and verify
     * Ensure ping and ssh to the vm work
     * Reboot an instance and check for ping
     * Remove rules and check if ping / ssh is disallowed
     * Create a source sec group and add that to the existing sec group
     * List security group rules and verify
     * Ensure ping and ssh to the vm work
     * Remove security group and check if ping / ssh is disallowed
     * Remove floating IP from the server and check if it is removed
     * Verify the working of VM rename
     * Create an image from the running server
     * Check if the VM comes to active state
     * Rebuild the vm with the new image
     * Delete the floating IP from the project
     * Pause/unpause the instance
     * Suspend/resume the instance
     * Terminate the instance
    """