Update owners

This change removes users that are not part of openstack anymore
and adds more people from the ciops team who are able to review
and approve new PRs.

Author: kstrenkova

OWNERS_ALIASES

@@ -7,10 +7,11 @@ aliases:
   - stuggi
   test-approvers:
   - lpiwowar
+  - adrianfusco
   - arxcruz
   - kstrenkova
   test-reviewers:
   - evallesp
-  - frenzyfriday
-  - sdatko
-  - adrianfusco
+  - rebtoor
+  - imatza-rh
+  - posikoya