VMware: deprecate ESX driver from virt configuration

Remove the VMware ESX driver configuration from the virt driver
configuration help options.

The commit d041b95b8977e77a51e6031c38f0011b44d3266a marked the
VMware ESX driver as deprecated. This is the first step in
starting to remove the driver in Juno.

Change-Id: I955ffee336feeca68994d9ea4e244f3c7e10eed2
Handle service creation race by service workers

This handle a race where a sibling has already created the service
record in the database.  This fix is similar to that of commit
f6c341b4.

Change-Id: I7975fc632eee34390c5d7dc275b52363ad45475e
Closes-bug: 1326901
Log when nova-conductor connection established

The current warning in wait_until_ready() is a bit of a red-herring.
When just looking at the logs, it's warning status may lead you to
believe the failure to connect to nova-conductor is fatal when really
it was retried and connected successfully.

The WARNING message on timeout is modified to clearly show that it is
retrying the connection.  A partner message is shown to inform that
the connection has been established.

Change-Id: I2040707df7caf8685c84c82ec9b8cc97cb04b47e
Updated from global requirements

Change-Id: Iaf117fa1ef752da09f2a0840baa9258dea9b3a61
Merge "Handle service creation race by service workers"
Merge "Updated from global requirements"
Merge "Log when nova-conductor connection established"
Merge "VMware: deprecate ESX driver from virt configuration"