TT#9211 Avoid non-POSIX usage of echo(1) in init script

Noticed during an upgrade:

| Setting up ngcp-sems-app (1.6.0-1+0~mr4.5.3.1) ...
| -ne Sems start disabled by default file
| Setting up ngcp-prompts-pro (0.8.3.1+0~mr4.5.3.1) ...

This is caused by POSIX echo not supporting the "-e"
option, compare dash:

| $ echo -ne "Sems start disabled by default file"
| -ne Sems start disabled by default file

with e.g. bash:

| $ echo -ne "Sems start disabled by default file"
| Sems start disabled by default file$

Let's avoid the "-n" option as well though to
have a proper and full newline in package
upgrades.

Change-Id: I620da808843c0c29d8d59994c5652a3fdc3ceef0

debian/ngcp-sems.init

@@ -21,7 +21,7 @@ fi
 
 
 if test "$SEMS_RUN" = "no" ; then
-    echo -ne "Sems start disabled by default file"
+    echo "Sems start disabled by default file"
     exit 0
 fi