Fixed reservation backend ajax, front-end reservation, bulk action for custom post type

1. I removed the bulk action for reservation and quotation post type.
Trash was removed from reservation. Edit was removed from both.
2. Ajax for approval didnt work. Fixed issue by changing action js
object into reserve_id, user_id, and product_id.
3. Front-end reservation was buggy. Increased determinism by making sure
WP_Query return post == $post->post_author & $post->post_content
==$product_id