Simplify devstack-logs publisher

* .../jenkins_job_builder/config/macros.yaml(devstack-logs): Stop
collecting testr and subunit log artifacts separately from the logs
directory once I47227ed28b60927d528fdf220c981cf5d8515c88 merges. The
SCP publisher tends to spam the console log with "file does not
exist" messages which some people are mistaking for the cause of
unrelated job failures, so this should help avoid that unfortunate
situation in the future.

Change-Id: Ic49a775042c3774dbd86e8fd6e5a94899ff12e38
Update devstack-gate jobs for Trove tempest tests

Define devstack-gate tests for Trove tempest testing.
Initially these are non-voting.
Partially implements blueprint: trove-tempest

Change-Id: Ib645b404fe0a16c70dedd8967d4a68296234611a
Merge "Simplify devstack-logs publisher"
Merge "Update devstack-gate jobs for Trove tempest tests"