flow: fix empty template.xxx in flow

[tarunKoyalwar]

Proposed Changes

[JS] <nil>
[WRN] [CVE-2024-4040] Could not execute step: [:RUNTIME] failed to execute flow
log(template)
if ( !template.hasOwnProperty('username') || !template.hasOwnProperty('password') ) {
  // if username or password is not provided, run unauthenticated exploit
  http("unauth-exploit")
} else {
  // if username and password is provided, run login script and authenticated exploit
  http("login") && http("auth-exploit")
}

 <- TypeError: Cannot read property 'hasOwnProperty' of undefined or null at <eval>:2:7(6)
[INF] No results found. Better luck next time!

• this type error ( javascript ) happens if template is nil , this pr creates a empty map instead of nil/null so that it can be easily used in flow without additional check for ( template != null )