SCS should implement Getversion

[Aaron Helsinger]

The SCS should implement a method GetVersion, that advertises its version. This can also be used by GENI monitoring to check that the SCS is up and running

[xyang@maxgigapop.net]

Feature added to AM core code base.

Reassign to Chad to update the Java code.

[xyang@maxgigapop.net]

Correction: nothing is required for Chad to update. Reassign to Aaron to test.

[Aaron Helsinger]

Looks fine.

Suggestions:

• Drop the top level geni_api return
• Drop the geni_ad_rspec_versions tag
• Do we need the geni_api_versions tag?
• Do you have a commit tag you can use for code_tag?
• Could the SCS report here something about the # of AMs for which it uses Ad RSpecs, or even which AMs it knows about?

I'm imagining something that you populate with an ls of the directory where you keep Ad RSpecs

  scs_known_ams: [
   <URL> = <Date of Ad RSpec>,
    ...
  ]

[xyang@maxgigapop.net]

Addressed the points in "Suggestions". However, scs_known_ams is not added.

XML-RPC API thread is separated from TEDB thread. Retrieving all the aggregates info requires some serious coding. We will leave it to low priority for now and revisit when we have a compelling use case.