SEQWARE-1959 - annotation in workflows

This branch name ended up being a total misnomer. While reviewing code, I discovered a slightly broken mechanism for annotations in the GCR and provision files. 

I repaired it and hooked it up to the Java API. Note that this totally kicks the can down the curb as far as improving provision files and gcr, but this handles the pressing need for annotations in workflows. 

The workflow gives examples of annotating processing events corresponding to jobs and annotating processing events corresponding to provision file events.