Fix for Bug 1626: Build failed due to upstream dependency not found

Change-Id: I719c106e6f2fb92c6f00d2f9595715e1a30c7362
Signed-off-by: palsus <subhankar.pal@altran.com>
diff --git a/docker/POL/Dockerfile b/docker/POL/Dockerfile
index 92b1ffd..990d325 100644
--- a/docker/POL/Dockerfile
+++ b/docker/POL/Dockerfile
@@ -24,16 +24,14 @@
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
     DEBIAN_FRONTEND=noninteractive apt-get --yes install \
-    curl=7.68.0-1ubuntu2.5 \
+    curl=7.68.0-1ubuntu2.6 \
     gcc=4:9.3.0-1ubuntu2 \
     python3=3.8.2-0ubuntu2 \
     python3-setuptools=45.2.0-1 \
-    python3-dev=3.8.2-0ubuntu2 && \
+    python3-dev=3.8.2-0ubuntu2 \
+    mysql-client-core-8.0=8.0.26-0ubuntu0.20.04.2 && \
     python3 -m easy_install pip==21.0.1
 
-RUN DEBIAN_FRONTEND=noninteractive apt-get --yes install \
-    mysql-client-core-8.0=8.0.25-0ubuntu0.20.04.1
-
 ARG PYTHON3_OSM_COMMON_URL
 ARG PYTHON3_OSM_POLICY_MODULE_URL