renamed booking supplier book_id to booking_id

updated bookingSupplier to supplierBooking
updated get supplier api in supplier report
added download button to download report

app/SupplierBooking.php

@@ -16,7 +16,7 @@ class SupplierBooking extends Model
     }
 
     public function booking(){
-        return $this->hasOne('App\Booking');
+        return $this->belongTo('App\Booking');
     }
 
     public function supplierBookingTtem()