attempt to resolve snapshot aggregation test failure

Skip-func-test-vm: true
Test-tag: test_snapshot_aggregation
Test-nvme: auto_md_on_ssd

Required-githooks: true

Signed-off-by: Tom Nabarro <tom.nabarro@intel.com>

src/tests/ftest/container/snapshot_aggregation.yaml

@@ -21,6 +21,7 @@ server_config:
       fabric_iface_port: 31417
       log_file: daos_server1.log
       storage: auto
+  system_ram_reserved: 8
 pool:
   control_method: dmg
   scm_size: 80G