Add manager name and UUID settings to manager

[ejeffrey]

The delphi and python managers have a configurable "manager name" and an automatically generated GUID along with settings to retreive them. This helps clients identify the manager in multi-manager environments. scalabrad should support these as well.

[maffoo]

Is the hostname of the manager not sufficient to identify which one you're connected to? Which clients actually use this?

[ejeffrey]

The datavault optionally uses this. The reason I added it is that there were problems where a manager would have multiple hostnames or IP addresses when accessed via the gigabit lan vs. PCS lan.