increase the delete cluster timeout (#1238)

A few Jenkins jobs failed because of the short timeout of the delete
cluster with the following error:

20:06:28  ods-ci-logger: INFO     ocm cluster with name xxxx exists!
20:07:24 ods-ci-logger: ERROR xxxx not deleted even after an hour.
EXITING

increasing the timeout from 60 minutes to 90 minutes

related to jira ticket: RHOAIENG-3917

ods_ci/utils/scripts/ocm/ocm.py

@@ -937,7 +937,7 @@ def delete_cluster(self):
             sys.exit(1)
         self.wait_for_osd_cluster_to_get_deleted()
 
-    def wait_for_osd_cluster_to_get_deleted(self, timeout=3600):
+    def wait_for_osd_cluster_to_get_deleted(self, timeout=5400):
         """Waits for cluster to get deleted"""
 
         count = 0