Try alternative to xargs in validate.sh

Author: botder

Diff for: tools/validate.sh

@@ -1,3 +1,13 @@
 #!/bin/bash
 
-find 'functions/' -name '*.yaml' -type f -print0 | xargs -0 -I {} tools/yajsv -s schemas/function.yaml {}
+exit_code=0
+
+find 'functions/' -name "*.yaml" -type f | while read -r file; do
+    tools/yajsv -s schemas/function.yaml "$file"
+    
+    if [ $? -ne 0 ]; then
+        exit_code=1
+    fi
+done
+
+exit $exit_code