Simplify copy of libmd0 library in POL dockerfile

Change-Id: Id411b68789ffcb705abafd9c336df77071cb8195
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/docker/POL/Dockerfile b/docker/POL/Dockerfile
index f264fba..9fb1217 100644
--- a/docker/POL/Dockerfile
+++ b/docker/POL/Dockerfile
@@ -71,10 +71,6 @@
 
 #######################################################################################
 # End of common prepration
-RUN DEBIAN_FRONTEND=noninteractive apt-get --yes update && \
-    DEBIAN_FRONTEND=noninteractive apt-get --yes install \
-    libmd0 \
-    && rm -rf /var/lib/apt/lists/*
 
 COPY --from=INSTALL /usr/bin/osm* /usr/bin/
 COPY --from=INSTALL /usr/bin/mysql /usr/bin/
@@ -82,6 +78,7 @@
 COPY --from=INSTALL /usr/bin/mysqlshow /usr/bin/
 COPY --from=INSTALL /usr/lib/x86_64-linux-gnu/libedit.so.2 /usr/lib/x86_64-linux-gnu/
 COPY --from=INSTALL /usr/lib/x86_64-linux-gnu/libbsd.so.0 /usr/lib/x86_64-linux-gnu/
+COPY --from=INSTALL /usr/lib/x86_64-linux-gnu/libmd.so.0 /usr/lib/x86_64-linux-gnu/
 
 COPY scripts/ /app/osm_pol/scripts/