[webservices] Major update to fdsnws-station service: new database and new location IDs

[Chad Trabant]

Hello everyone,

On February 4th (Wednesday next week) we are planning a major update to 
the fdsnw-station service including these changes (and many smaller bug 
fixes):

* Move to PPAS
* Change empty location IDs from two-space strings to empty strings (for 
FDSN conformance)

To facilitate comparison of metadata we will not change the location IDs 
in the beta station service until Monday.  After an update on Monday we 
will be doing final testing of the service for functionality.

Regarding the move to PPAS we need a green light from Ops that the 
database contents are ready.  This services uses the following table 
sets: metadata including networks, virtual network, time series 
(all_channel_summary), BUD tables, license tables.

If there are concerns from Ops regarding the database readiness or 
otherwise we need to know now.  If we need to meet we should do so soon, 
like tomorrow.  Let us know.

Regarding the change in location IDs we need to check a number of tools 
to make sure they will work with the change.  To describe the change and 
track status of packages there is a Wiki page here:

http://dmscode/projects/fdsnws-station/wiki/Representing_location_IDs_as_empty_strings

Chad, Adam, Robert, Yazan and Bruce all have things marked with their 
name to check, please do so ASAP.  There are likely a few more, please 
add them.\

Again if there are issues with the change please talk to me right away.

thanks,
Chad
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