Container image post refresh from openshift

[enoodle]

This will enable container images to grab information from openshift (refresh_openshift_information) and will hook this in the queue for each new image after the refresh. This makes sense after #14606 when skiping openshift image refresh.

[enoodle]

cc @bazulay @simon3z @agrare @cben
This assumes #14606 disabled the collection of images from Openshift.

• We might want to condition the images refresh from Openshift on the same/similar flag.
• We might want to add a timestamp of the last refresh of Openshift data on the images and recollect this data after some time has passed instead of only doing it on new images.

Please advise on both. I will start working on the second point but would like your input.

[enoodle]

Added last_openshift_refresh field to save the last time the image was refreshed from Openshift. Using this field and a time in days configured in the settings images can be re-scanned from Openshift after a certain time period.

[miq-bot]

This pull request is not mergeable. Please rebase and repush.

[enoodle]

@cben I changed here to use "save_inventory" functions in accordance to our discussion about this. PTAL

[miq-bot]

Checked commits enoodle/manageiq@059bf79~...bc6a105 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
6 files checked, 0 offenses detected
Everything looks good. ⭐

[miq-bot]

This pull request is not mergeable. Please rebase and repush.

[chessbyte]

@simon3z rebase and repush?

[enoodle]

@simon3z @chessbyte IIUC this kind of solution is less relevant with the graph refresh on its way to us.

[cben]

For the record, we saw fetching just a single image metadata with oc describe image sha256:... get stuck for minutes on a customer's openshift 4.2.
=> This makes this direction impractical. If a single image is slow similarly to getting all images, we can get nothing or all at once.
The slowness might be specific to that environment (old openshift, ~63000 images in openshift registry), but refresh performance in that the enviroment motivated this work in the first place...