Updated alpine builder image to 4.6.0 in examples

Updated alpine builder image to the latest version 4.6.0 which uses the
latest RMR release (4.9.0).

Issue-Id: RIC-986
Signed-off-by: Abhijit Gadgil <gabhijit@iitbombay.org>
Change-Id: Icb30b588e00926886c0a06bec05461ceaedea300
diff --git a/examples/Dockerfile-Ping b/examples/Dockerfile-Ping
index 40b19d8..323db1e 100644
--- a/examples/Dockerfile-Ping
+++ b/examples/Dockerfile-Ping
@@ -17,7 +17,7 @@
 FROM python:3.8-alpine
 
 # copy rmr libraries from builder image in lieu of an Alpine package
-COPY --from=nexus3.o-ran-sc.org:10002/o-ran-sc/bldr-alpine3-rmr:4.0.5 /usr/local/lib64/librmr* /usr/local/lib64/
+COPY --from=nexus3.o-ran-sc.org:10002/o-ran-sc/bldr-alpine3-rmr:4.6.0 /usr/local/lib64/librmr* /usr/local/lib64/
 # RMR setup
 RUN mkdir -p /opt/route/
 COPY test_route.rt /opt/route/test_route.rt
diff --git a/examples/Dockerfile-Pong b/examples/Dockerfile-Pong
index 8013e90..82b76d5 100644
--- a/examples/Dockerfile-Pong
+++ b/examples/Dockerfile-Pong
@@ -17,7 +17,7 @@
 FROM python:3.8-alpine
 
 # copy rmr libraries from builder image in lieu of an Alpine package
-COPY --from=nexus3.o-ran-sc.org:10002/o-ran-sc/bldr-alpine3-rmr:4.0.5 /usr/local/lib64/librmr* /usr/local/lib64/
+COPY --from=nexus3.o-ran-sc.org:10002/o-ran-sc/bldr-alpine3-rmr:4.6.0 /usr/local/lib64/librmr* /usr/local/lib64/
 # RMR setup
 RUN mkdir -p /opt/route/
 COPY test_route.rt /opt/route/test_route.rt