Update Dockerfile for PF base image

The Policy Framework base image run under the "onap" user rather than
under the "root" user. This means that root access has to be enabled in
child Dockerfiles for configuraiton that requires root access.

Root access is turned off again later in the Dockerfile so that the
image will run under another user.

Issue-ID: POLICY-4558
Change-Id: Idf5c1565fd74b17bcabc137f5292ebc097c3d246
Signed-off-by: liamfallon <liam.fallon@est.tech>
diff --git a/packages/policy-clamp-docker/src/main/docker/PolicyParticipant.Dockerfile b/packages/policy-clamp-docker/src/main/docker/PolicyParticipant.Dockerfile
index fe08785..c82754b 100644
--- a/packages/policy-clamp-docker/src/main/docker/PolicyParticipant.Dockerfile
+++ b/packages/policy-clamp-docker/src/main/docker/PolicyParticipant.Dockerfile
@@ -1,6 +1,6 @@
 #-------------------------------------------------------------------------------
 # ============LICENSE_START=======================================================
-#  Copyright (C) 2021-2022 Nordix Foundation.
+#  Copyright (C) 2021-2023 Nordix Foundation.
 # ================================================================================
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -40,6 +40,7 @@
 ENV POLICY_LOGS=$POLICY_LOGS
 ENV POLICY_HOME=$POLICY_HOME/clamp
 
+USER root
 RUN mkdir -p $POLICY_HOME $POLICY_LOGS && \
     chown -R policy:policy $POLICY_HOME $POLICY_LOGS