Updating RMR version

Signed-off-by: czichy <thoralf.czichy@nokia.com>
Change-Id: Iad4a76305f578c2d2c968ecd2fe6da6e786da580
diff --git a/Dockerfile b/Dockerfile
index f9f9eab..7760f56 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -44,7 +44,7 @@
 
 WORKDIR /playpen
 # Install RMr (runtime and dev) from debian package cached on packagecloud.io
-ARG RMR_VER=3.6.2
+ARG RMR_VER=4.8.0
 
 # if package cloud is actually working, this is preferred
 #