Fix startup CrashLoopBackOff issue

Traffic steering xApp crashes on startup due to a bug in
xapp-frame-cpp $XAPP_DESCRIPTOR_PATH parser.

This change updates both xapp-frame-cpp and RMR dependencies
to fix the CrashLoopBackOff issue in TS xApp.

Issue-ID: RICAPP-186

Signed-off-by: Alexandre Huff <alexandrehuff@utfpr.edu.br>
Change-Id: Ifd06d19a8200e2842b0c9e06b79d42a70f6b8041
diff --git a/rmr-version.yaml b/rmr-version.yaml
index dbec252..802fbb9 100644
--- a/rmr-version.yaml
+++ b/rmr-version.yaml
@@ -1,3 +1,3 @@
 # Communicate to CI which version of RMR to install in the build/vet environment
 ---
-version: 4.7.4
+version: 4.8.1