Switch scenario004-multinode-containers to Ceph filestore

With [1] we now have both LVM and /dev/loop3 for either
bluestore or filestore in the same branch. Let's include
filestore testing in queens by switching 004 to filestore
but keep 001 on bluestore.

Patching Queens directly to test both blue and file store.
I expect Rocky and newer will go out with bluestore so not
switching those.

[1] https://review.openstack.org/#/c/641479

Change-Id: I13c6c3fc88136157b8036c15d23589380b1fcdd8

ci/environments/scenario004-multinode-containers.yaml

@@ -93,15 +93,10 @@ parameter_defaults:
   Debug: true
   DockerPuppetDebug: True
   CephAnsibleDisksConfig:
-    osd_objectstore: bluestore
-    osd_scenario: lvm
-    lvm_volumes:
-      - data: ceph_lv_data
-        data_vg: ceph_vg
-        db: ceph_lv_db
-        db_vg: ceph_vg
-        wal: ceph_lv_wal
-        wal_vg: ceph_vg
+    devices:
+      - /dev/loop3
+    journal_size: 512
+    osd_scenario: collocated
   # Without MDS and RGW we create 5 pools, totalling 160 PGs at 32 PGs each
   # With MDS and RGW instead we create 9 pools, so we lower the PG size
   CephPoolDefaultPgNum: 16