Fix job metrics

[Simwar]

What does this PR do?

The last change did not include a code path for jobs, only for cron jobs.
Also, there was an issue when the value of the succeeded/failed metric was set to 0, before being set to 1.

Motivation

Several customers reported missing values

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[codecov]

Codecov Report

Merging #4943 into master will decrease coverage by 0.57%.
The diff coverage is 100%.

Impacted Files	Coverage Δ
...atadog_checks/kubernetes_state/kubernetes_state.py	79.72% <100%> (ø)
kubernetes_state/tests/test_kubernetes_state.py	96.29% <100%> (ø)
...checks_dev/tests/plugin/test_environment_runner.py
riakcs/datadog_checks/riakcs/riakcs.py
oracle/tests/test_oracle.py
...r/datadog_checks/openstack_controller/__about__.py
twistlock/datadog_checks/twistlock/twistlock.py
linkerd/datadog_checks/linkerd/linkerd.py
...oller/datadog_checks/openstack_controller/utils.py
istio/tests/test_e2e.py
... and 831 more