qa: force creation of fs with EC default data pool

In the future, we should add the EC data pool as a supplementary data
pool but that requires a mount to setup which is awkward in the code
here. When cephfs-shell is more widely available, this will be easier.

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

qa/tasks/cephfs/filesystem.py

@@ -585,7 +585,10 @@ def create(self):
                     'osd', 'pool', 'create',
                     data_pool_name, self.pgs_per_fs_pool.__str__())
             self.mon_manager.raw_cluster_cmd('fs', 'new',
-                                             self.name, self.metadata_pool_name, data_pool_name)
+                                             self.name,
+                                             self.metadata_pool_name,
+                                             data_pool_name,
+                                             "--force")
         self.check_pool_application(self.metadata_pool_name)
         self.check_pool_application(data_pool_name)
         # Turn off spurious standby count warnings from modifying max_mds in tests.