[oadp-1.0] Update OWNERS file (#829)

* update owners file

* update reviewers list and add John back to approvers

Co-authored-by: Savitha Raghunathan <[email protected]>

Author: openshift-cherrypick-robot

OWNERS

@@ -4,21 +4,14 @@ approvers:
   - jmontleon
   - shawn-hurley
   - rayfordj
-  - alaypatel07
-  - pranavgaikwad
   - dymurray
   - shubham-pampattiwar
-  - JaydipGabani
   - kaovilai
+  - eemcmullan
+  - savitharaghunathan
 reviewers:
-  - jwmatthews
   - sseago
-  - jmontleon
-  - shawn-hurley
-  - rayfordj
-  - alaypatel07
-  - pranavgaikwad
-  - dymurray
   - shubham-pampattiwar
-  - JaydipGabani
   - kaovilai
+  - eemcmullan
+  - savitharaghunathan