Hypervisor uptime not relevant for VCDriver

[Sagar Ratnakara Nikam]

The uptime feature is not implemented in the VCDriver. Since the VCDriver extends the ESX Driver, the implementation of ESX Driver gets invoked whenever the uptime API is called for a cluster.

The ESX Driver returns this message when the uptime api is invoked.
'Please refer to %s for the uptime' % CONF.vmware.host_ip

This message is not relevant for the VCDriver.

Also the VCenter does not provide uptime for clusters.

Hence the correct implementation for this API is to return
NotImplementedError

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/90607

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/90607
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=94cb04540828d9a3f9186c4e6922baabc784a647
Submitter: Jenkins
Branch: master

commit 94cb04540828d9a3f9186c4e6922baabc784a647
Author: Sagar Ratnakara Nikam <email address hidden>
Date: Sun Apr 27 22:42:06 2014 +0530

    VCDriver - No longer returns uptime due to multiple hosts

    The vCenter cluster will have multiple hosts.
    The cluster does not have a uptime feature.
    Returning uptime of one of the host/longest
    running host, can be misleading to the user.
    Hence raising NotImplementedError
    Closes-Bug:#1313375

    Change-Id: I70e5ab35b8944abd7b874762de2af5b01d6a7313