Merge pull request openshift#155 from shiftstack/update_team

NO-JIRA: OWNERS: Update team osasinfra

Author: openshift-merge-bot[bot]

OWNERS_ALIASES

@@ -1,8 +1,7 @@
 aliases:
   shiftstack-team:
-    - EmilienM
-    - MaysaMacedo
+    - dkokkino
+    - gryf
     - mandre
-    - mdbooth
     - pierreprinetti
     - stephenfin