set ovs_user_id for openvswitch and ovn so they run in non root

also ensure hugepage mount directory can be write by QEMU user
with id 42424

Change-Id: Ib249e15240e9feb1c1029cba4b5bcc4f018fbc10
diff --git a/charts/openvswitch/values.yaml b/charts/openvswitch/values.yaml
index 01aa93d..5555b60 100644
--- a/charts/openvswitch/values.yaml
+++ b/charts/openvswitch/values.yaml
@@ -241,4 +241,9 @@
     #     vHost IOMMU feature restricts the vhost memory that a virtio device
     #     access, available with DPDK v17.11
     # vhost_iommu_support: true
+
+  ## OVS supports run in non-root for both OVS and OVS DPDK mode, you can
+  # optionally specify to use user with id 42424, ensure the user exists
+  # in the container image.
+  ovs_user_name: "openvswitch:openvswitch"
 ...