ansible-gpg-vault: fix broken add user

vault.sh

@@ -23,11 +23,9 @@ fi;
 
 addUser() {
     USER="$1"
-    echo "grep for user $USER"
-    grep "$USER" $KEY_FILE
-    echo "rc=$?"
     if ! grep -q "$USER" $KEY_FILE; then
         echo "$USER" >> $KEY_FILE
+        echo "INFO: added user '$USER' to key file"
     else
         echo "WARNING: user '$USER' already in key file"
     fi;