Publicize actor version issues

We need to check running actor versions and alert on any possible discrepancies. Specifically:

• alert when a running actor's version differs from the current eups version
• alert when the version of any running actor's dependencies differs from the version installed with the running actor.

We can additionally note (but not as a warning/alert) when a newer version of a dependency is available. Not sure about this.

The proposal is to have the checks done in the existing version command, as implemented in ics_utils. The result would be propagated in a a new field added to the end of the existing *_version keys.

As far as displaying the issues go, we propose adding a new "channel" to the existing alertsActor for displaying "observing" warnings. Besides these version mismatches, some obvious keys might be ingest/reduce errors, or timing problems (getVisit, convergence ,ramp writes, etc), etc. These would be enumerated by adding a new field to the existing actorkeys dictionaries, just as we do for FITS and STS flags.

Obviously, child tickets to be linked in.