Cleanup build folder before new files are generated

Signed-off-by: reinaortega <miguelangel.reinaortega@etsi.org>

scripts/validate.sh

@@ -19,12 +19,14 @@ done
 
 echo "Using git branch $1"
 
+mkdir -p /home/etsi/dev/build
+cd /home/etsi/dev/build
+rm -r -v *
+
 if [[ "$1" =~ .*-dev$ || "$1" =~ \d+(\.?\d)+ || "$1" == "master" ]]; then
 
 	cd /home/etsi/dev/robot2doc/robot2doc
 
-	mkdir -p /home/etsi/dev/build
-
 	python3 create_sols.py ../../robot 'local' ../../build
 	res2=$?
 else res2=0