RO start_build updated with a minor fix in --notest option

Change-Id: Ib8e3632b4583d3feb1855090d86c6dae64bab612
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

jenkins/RO/start_build

@@ -27,7 +27,7 @@ export OSM_MDG=RO
 OSM_load_config
 
 NOTEST=""
-if [ $1 = "--notest" ]; then
+if [ "$1" = "--notest" ]; then
     shift
     NOTEST="y"
 fi