BUG/MINOR: reg-tests: fix service dependency script

I badly tested my previous patch forgetting to remove the "+" testing
present in options, and not in services; the list of services do not
have any "+" at the beginning of each service

this patch is fixing commit aabde7133242563109b4f36c42e732f083 ("MINOR:
reg-tests: add a way to add service dependency")

Signed-off-by: William Dauchy <wdauchy@gmail.com>

scripts/run-regtests.sh

@@ -204,7 +204,7 @@ _findtests() {
       alternatives=$(echo "$requiredservice" | sed -e 's/|/ /g')
       found=
       for alt in $alternatives; do
-        if echo "$SERVICES" | grep -qw "\+$alt"; then
+        if echo "$SERVICES" | grep -qw "$alt"; then
           found=1;
 	fi
       done