update wasmetadata extractor docs

[tallenaz]

• [x] devopsdocs: explain that was-robot-suite rake task pulls a deployment artifact from jenkins
  • [x] WasMetadataExtractor ops concerns
  • [x] was_robot_suite ops concerns
• [x] update jenkins description to reflect this
• [x] put this explanation in README of
  • [x] was_robot_suite (also mention openwayback inclusion in rake task)
  • [x] wasmdextractor docs.
  • [x] openwayback?

[ndushay]

additionally, from sul-dlss/WASMetadataExtractor#4:

must haves:

• [x] operations checklist written
• [x] mailing list (indicate in checklist and ops concerns?)

at least add TODOs for to prod checklist for

• [x] badges on README for release, and the below,
• [x] travis build that runs tests (if not deploying from jenkins, remove from jenkins)
• [x] coveralls for tests (see dlss-wowza for how to use coveralls w java)

see also #5

[ndushay]

once PRs are taken, all done!